Samsung SGH-F300 Service Manual

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					3. Flow Chart of Troubleshooting

3-1.Baseband
3-1-1. Power ON
           'Power ON' Does not work



         Check the current consumption




             Current consumption                               NO
                                                                                       Down load again
                      ≥100mA ?


                          YES

               Check the battery voltage



                                                               NO
               Voltage ≥ 3.3V ?                                                        Charge the Battery

                          YES

            Check the pins of U838



                                                               NO
                  C215 ≥ 1.8V ?                                                      Check U838 and C215

                           YES

                                                   NO
           C217 and C218 = 2.8V?

                           YES                                              NO
                                                   C219=1.5V?                          Check U838 and C219

                                                YES


                Check the clock signal
                                                                 NO          Check the clock generation circuit
                  at pin #3 of TCX100
           Freq.=26MHz,Vrms ≥300mV                                                         TCX100


                           YES


             Check the Initial operation



                        END
                                                  3-1

                    SAMSUNG Proprietary-Contents may change without notice
                     This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting




                                                                                                             VCCA_2.8V                            VCCD_2.8V
                                                                                                      VRF_2.8V                 HPEIO_1.8V




                                                                                                                                                                                              VBAT
                                                                                                     C202            C200                                            C201




                                                                                                                             C203
                                                                                    EAR_ADC

          DSP_DB(0:15)                                                                                                                                                                                  C209




                                                                                                            M10
                                                                 G10
                                                                 K 10




                                                                 D13




                                                                                                            N11




                                                                                                            K 15
                                                                                                            B 15

                                                                                                            B 13
                                                                                                            C10
                                                                                                            P13
                                                                 F10




                                                                                                            L 11




                                                                                                            F11
                                                                 J 10




                                                                                                            M3
                                                                 G9
                                                                 G8
                                                                 G7




                                                                                                            G5
                                                                 H9
                                                                 H8
                                                                 H7
                                                                 H6




                                                                                                            B4




                                                                                                            R2
                                                                                                            K4




                                                                                                            N6
                                                                                                            C4




                                                                                                            A6




                                                                                                            N5
                                                                                                            P6




                                                                                                            E8
                                                                 F9
                                                                 F8
                                                                 F7




                                                                                                            F6
                                                                 J9
                                                                 J8
                                                                 J7




                                                                                                            J4




                                                                                                            J3
                                                                 2
                                                                 1
                                                                        NC6
                                                                        NC5
                                                                    GNDS17
                                                                    GNDS16
                                                                    GNDS15
                                                                    GNDS14
                                                                    GNDS13
                                                                    GNDS12
                                                                    GNDS11
                                                                    GNDS10
                                                                     GNDS9
                                                                     GNDS8
                                                                     GNDS7
                                                                     GNDS6
                                                                     GNDS5
                                                                     GNDS4
                                                                     GNDS3
                                                                     GNDS2
                                                                     GNDS1




                                                                                                                GNDD
                                                                                                                 VDDD




                                                                                                            GND_HCUR



                                                                                                                GNDQ
                                                                 A UX_A DC3




                                                                                                                 VSS4
                                                                                                                 VSS3
                                                                                                                 VSS2
                                                                                                                 VSS1
                                                                                                              VDD_IO2
                                                                                                              VDD_IO1
                                                                                                                 VDD3
                                                                                                                 VDD2
                                                                                                                 VDD1

                                                                                                            GND_PSC2
                                                                                                            GND_PSC1

                                                                                                                VDD67
                                                                                                                 VDD5
                                                                                                                GNDV
                                                                                                                 VDDV
                                                                                                                GNDB
                                                                                                                 VDDB
                                                                                                            GND_OCTL
                                                                                                            VDD_OCTL
                                                                                                                                                                               VDD34 C11
                                                                                                                                                                               VDD12 J13

                                           DSP_DB(15)   D2   DB15                                                                                                             UP_CLK    N9
                                           DSP_DB(14)   D3   DB14                                                                                                             UP_RST    R10
                                                                                                                                                                                                      SIMCLK
                                           DSP_DB(13)                                                                                                                           UP_IO
                                                                                                                                                                                                      SIMRST
                                                        E3   DB13                                                                                                                       P10
                                           DSP_DB(12)   E2                                                                                                                     SIM_IO   J11
                                                                                                                                                                                                      SIMDATA
                                                             DB12
                                           DSP_DB(11)   F3                                                                                                                   SIM_RST    K11
                                                                                                                                                                                                      SIM_IO
                                                             DB11
                                                                                                                                                                                                      SIM_RST                                                                                                      VRTC_1.5V
                                           DSP_DB(10)   F2   DB10                                                                                                            SIM_CLK    K14
                                           DSP_DB(9)    F1
                                                                                                                                                                                                      SIM_CLK
                                                             DB9
                                           DSP_DB(8)    F4   DB8                                                                                                                 VSIM   K12
                                           DSP_DB(7)    G4                                                                                                                       VRTC   H11
                                                                                                                                                                                                      VSIM
                                                             DB7
                                           DSP_DB(6)    G3   DB6                                                                                                            LED2_DRV    G12                               VCCB_2.9V
           DSP_AB(0:8)                     DSP_DB(5)    H5   DB5                                                                                                            LED1_DRV    G13                                               VLDO_1.8V VCCA_2.8V       VRF_2.8V
                                           DSP_DB(4)    J6   DB4                                                                                                            RING_DRV    F13
                                           DSP_DB(3)    J5   DB3                                                                                                             VIB_DRV    F15                                                                                       VCCD_2.8V                             R204
                                           DSP_DB(2)    K3   DB2                                                                                                              VLDO_7    C12
                                           DSP_DB(1)    K2   DB1                                                                                                              VLDO_6    A14                                                                                                  VLDO_1.5V
                                           DSP_DB(0)    K1   DB0                                                                                                               VL5S_B   C9
                                       DSP_AB(8)        K5   AB8                                                                                                               VL5S_A   D10

                                                                                                            U838
                                       DSP_AB(7)        K7   AB7                                                                                                              VLDO_5    B10
                                       DSP_AB(6)        M1   AB6                                                                                                               VL4S_B   B11                                     C214
                                       DSP_AB(5)        M2                                                                                                                     VL4S_A   A12
                                                                                                                                                                                                      DCS_TX_EN
                                                             AB5
                                                        N2                                                                                                                    VLDO_4
                                                                                                                                                                                                      GSM_TX_EN
                                       DSP_AB(4)             AB4                                                                                                                        B12
                                       DSP_AB(3)        N1   AB3                                                                                                              VLDO_3    A13




                                                                                                                                                                                                                                                                                                                        1
                                       DSP_AB(2)        L5   AB2                                                                                                              VLDO_2    J12
                                       DSP_AB(1)        P1   AB1                                                                                                              VLDO_1    G11                                                                                                                                    BAT200
                                       DSP_AB(0)        K6   AB0                                                                                                                VACC    F14
                         T_DSP_IO                       L3
                                                                                                                                                                                                               TP_VACC
      DSP_IO                                                 I|O
                                                                                                                                                                                              TP_CSN_PSC                 VBAT           C221       C215      C216          C217              C218   C219    C220
                                                        L2   RWN                                                                                                             CSN_PSC K8
    DSP_RWN                                                                                                                                                                                                  UP_CS




                                                                                                                                                                                                                                                                                                                        2
                          R205                          R3   RESETN_CSP                                                                                                     SCLK_PSC L8
FLASH_RESET                                                                                                                                                                  SDO_PSC N7
                                                                                                                                                                                                             UP_SCLK
                                                        E6   OCTL0                                                                                                            SDI_PSC M7                     UP_SDO
                                                                                                                                                                                                             UP_SDI
                         C223




                                                        C5   OCTL1
                                 BAND_SEL               F5   OCTL2                                                                                                             VEXT     E14
                                  MOD_SEL               E5                                                                                                                     VBAT     E13
                                                             OCTL3
                                     TX_EN              A4   OCTL4                                                                                                          CH_BDRV     E11
                                    XOENA                                                                                                                                                                                                                                                           VCCB_2.9V
                                                        G6   OCTL5                                                                                                           CH_ISEN    F12
                                    SX_EN               B3   OCTL6                                                                                                           CH_RES     D14
                                   PAC_EN               A3
                                                                                                                                                                                                                                                  ICHRG
                                                             OCTL7
                                    RX_EN                                                                                                                                   ADC_AUX2 D15                                                                                                TH200
                                                        B1                                                                                                                  ADC_AUX1
                                                             SERLE1                                                                                                                  E10
                                                        A2   SERLE2                                                                                                             VREF A10
                                    SERLE                                                                                                                                       CREF E9
                                   SERDAT
                                                        C1   SERDA                                                                                      VIB _RNG_EN                                                                                                                   R210
                                                                                                                                                                                                                                                                                                           C228
                                                                                                                                                        PWR_SW1N




                                                                                                                                                        PWR_K EEP
                                                                                                                                                        PSW1_B UF
                                                                                                                            P5 A DC_A UX4




                                                        C2   SERCK                                                                                                           RTC_ALMNH10
                                                                                                                                                        PWR_SW2
                                                                                               A UXOUTN
                                                                                               A UXOUTP
                                                                                               MICOUTN




                                   SERCLK
                                                                                                                                                        RESET_O




                                                                                                                                                                                                                                                  RTCALARM
                                                                                               MICOUTP




                                                                                                                            N4 RTC_CL K
                                                                                                                               XOENA Q
                                                                                               A OUTA N

                                                                                               A OUTB N
                                                                                               A OUTA P

                                                                                               A OUTB P
                                                                             RXTXQN
                                                                             RXTXQP
                                                                             RA REF2
                                                                             RA REF1




                                                                                               A UXINN
                                                                                               A UXINP
                                                                             RXTXIN
                                                                             RXTXIP




                                                                                               VXVCM
                                                                                               MICINN




                                                                                               VREGN
                                                                                               MICINP




                                                                                               VREGP




                                                                                               DA IDO




                                                                                                                                                                                                             R211
                                                                                               DA IRN




                                                                                                                                                                                                                                                                        C231
                                                                                               DA ICK




                                                                                                                                                        INTRQ
                                                                                                                            P3 DINTR




                                                                                                                                                        MODE
                                                                                               DA IDI




                                                                                                                                                                                                                                       SUB_BATT




                                                                                                                                                                                                                                                                               R212
                                                                 D9 A FC
                                                                    TXP




                                                                                                                                                                                                 C230
                                                                                                                            R6 MC
                                                                 E7

                                                                             B5
                                                                             B6
                                                                             D7
                                                                             D6
                                                                             C7
                                                                             C6

                                                                                               P11
                                                                                               N12
                                                                                               R12
                                                                                               P12
                                                                                               N14
                                                                                               M14
                                                                                               N15
                                                                                               P15
                                                                                               M15
                                                                                               L 14
                                                                                               K 13
                                                                                               L 13
                                                                                               R13
                                                                                               M13
                                                                                               R14
                                                                                                R4
                                                                                                P4
                                                                                                L6
                                                                                                M6



                                                                                                                            D1




                                                                                                                                                        C14
                                                                                                                                                        C15
                                                                                                                                                         L7
                                                                                                                                                         K9
                                                                                                                                                        N10
                                                                                                                                                         M9
                                                                                                                                                        L 10
                                                                                                                                                         L9




                                                                                                                                                                                                 VBAT
                                                                                                              C232
                                                                             C233




                                                                                                                                                                                                     INTRQ
                                                                                                                                                                                                     PWR_KEEP
                                                                                                                                                                                                     RST
                                                                                     RTX_QN
                                                                                     RTX_QP
                                                                                      RTX_IN
                                                                                      RTX_IP




                                                                                                 A OUTA P

                                                                                                 A OUTB P

                                                                                                   MICINP

                                                                                                MICOUTP
                                                                                                  A UXINP

                                                                                               A UXOUTP




                                                                                                                             CL K 13M_CSP

                                                                                                                                              DSP_INT



                                                                                                                                                        PSW1_B UF
                                                                      A FC
                                                                     VA PC




                                                                                                A OUTA N

                                                                                                A OUTB N

                                                                                                  MICINN

                                                                                               MICOUTN

                                                                                                  A UXINN

                                                                                               A UXOUTN




                                                                                                                                  XOENA Q




                                                                                                                                                           J IG_ON
                                                                                                                                                          PWR_ON
                                                                                                                                   CL K 32K




                                                                                                                                                                                R214




                                                                                                                                                           VRF_2.8V




                                                                                                                                                        R111




                                                             R112
                         AFC
                                                                                                                                                                                                                    C125                           R113
                                                                      C126                                                                                                                                                                                                                          CLK26M
                                                                                                                                                                                  C129




                                                                                                                                                          3-2
                                                                       SAMSUNG Proprietary-Contents may change without notice
                                                                              This Document can not be used without Samsung's authorization
                                                                 Flow Chart of Troubleshooting




                             3-3
SAMSUNG Proprietary-Contents may change without notice
 This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting




3-1-2. Initial



                         Initial Failure



                                                                                             Check the U838
                 The voltage at the C215=1.8V?                        NO
                                                                                     (If it has some problem,
                 The voltage at the C218=2.8V?
                                                                                       it has to be replaced.)

                                   YES

                                                                                             Check the U838
                  The voltage at the VR301                           NO
                                                                                     (If it has some problem,
                         " Low --> High" ?
                                                                                       it has to be replaced.)

                                   YES


                    There is 32.768KHz wave                          NO
                                                                                           Check the UCP300
                    form at the C317, C318 ?


                                      YES


                        The voltage is 2.8V                          NO
                                                                                            Check the U838
                      at the C216,C217,C218 ?


                                   YES

                                                                     NO
                        LCD Display OK ?                                                   Check the LCD part

                                   YES

                                                                     NO
                     Sound operation OK ?                                              Check the Audio part

                                   YES


                                END




                                                       3-4
                          SAMSUNG Proprietary-Contents may change without notice
                           This Document can not be used without Samsung's authorization
                                                                                                                                                                                                     Flow Chart of Troubleshooting




                                                                              HP_CORE_1.57V
                                                                                                                                                                                   VRTC_1.5V
                                                                                                                          HP_CORE_1.57V     HPEIO_1.8V




                                                                                                     C302          C303
                                                                                                                                                                                                       C304

                                                                                                            C305          C306       C307   C308     C309       C310


                                                                                C311




                                                                                                                                                                                                                                         CLK13M_HPE
                                                                                                                                                                                                                                         TR_RST




                                                                              W18




                                                                              W12

                                                                              W14
                                                                              M12
                                                                              M11
                                                                              M10




                                                                              G18

                                                                              G15
                                                                              R11




                                                                              H12
                                                                              H11
                                                                              H10




                                                                              N18

                                                                              H18




                                                                              U12




                                                                              D18

                                                                              C14




                                                                              R12
                                                                              A18

                                                                              V13




                                                                              B13




                                                                              B16
                                                                              B12
                                                                              F18
                                                                              F17

                                                                              T11




                                                                              T18

                                                                              L16
                                                                              J12




                                                                              W8
                                                                              M9
                                                                              M8




                                                                              M2
                                                                              G9
                                                                              G8




                                                                              G2
                                                                              H9
                                                                              H8




                                                                              U5
                                                                              U1




                                                                              D9

                                                                              C1
                                                                              K8




                                                                              A2

                                                                              V7




                                                                              B8




                                                                              P1




                                                                              B6
                                                                              B4
                                                                              F1
                                                                              L8
                                                                              L7




                                                                              L4
                 A(0:25)


                                                                     2
                                                                     1
                                                                      NC2
                                                                      NC1




                                                                                      VSS18
                                                                                      VSS17
                                                                                      VSS16
                                                                                      VSS15
                                                                                      VSS14
                                                                                      VSS13
                                                                                      VSS12
                                                                                      VSS11
                                                                                      VSS10
                                                                                       VSS9
                                                                                       VSS8
                                                                                       VSS7
                                                                                       VSS6
                                                                                       VSS5
                                                                                       VSS4
                                                                                       VSS3
                                                                                       VSS2
                                                                                       VSS1
                                                                                 VDD_CORE8
                                                                                 VDD_CORE7
                                                                                 VDD_CORE6
                                                                                 VDD_CORE5
                                                                                 VDD_CORE4
                                                                                 VDD_CORE3
                                                                                 VDD_CORE2
                                                                                 VDD_CORE1
                                                                              VDD_IO_1P8_18
                                                                              VDD_IO_1P8_17
                                                                              VDD_IO_1P8_16
                                                                              VDD_IO_1P8_15
                                                                              VDD_IO_1P8_14
                                                                              VDD_IO_1P8_13
                                                                              VDD_IO_1P8_12
                                                                              VDD_IO_1P8_11
                                                                              VDD_IO_1P8_10
                                                                               VDD_IO_1P8_9
                                                                               VDD_IO_1P8_8
                                                                               VDD_IO_1P8_7
                                                                               VDD_IO_1P8_6
                                                                               VDD_IO_1P8_5
                                                                               VDD_IO_1P8_4
                                                                               VDD_IO_1P8_3
                                                                               VDD_IO_1P8_2
                                                                               VDD_IO_1P8_1
                                                                                    VSSA_U
                                                                                    VDDA_U
                                                                                    VSSA_D
                                                                                    VDDA_D




                                                                                       VRTC

                                                                                     RESTN

                                                                                     TRSTN
                                                                                         CKI

                                                                                        TMS
                                      A(0)                  B7   A_A0
                                      A(1)                  C8   A_A1                                                                                                                 TDO      T12
                                      A(2)                  D8   A_A2                                                                                                                   TDI    V14
                                      A(3)                  A6   A_A3                                                                                                                  TCK     U14
                                      A(4)                  C6   A_A4                                                                                                          CKO_IACK        N12
                                      A(5)                  C5   A_A5                                                                                                       IOBIT1_PIO06       N11                              HOLD
                                      A(6)                  D7   A_A6                                                                                                       IOBIT0_PIO05       V12
                                                                                                                                                                                                                                KEY_EL_ON
                                      A(7)                  E7   A_A7                                                                                                       SPFS1_PIO15        N15
                                                                                                                                                                                                                                PCM_SYNC
                                      A(8)                  C4   A_A8                                                                                                  SPTXD1_I2SD_PIO16       N16
                                                                                                                                                                                                                                PCM_IN
                                      A(9)                  C2   A_A9                                                                                                      SPRXD1_PIO17        M17
                                                                                                                                                                                                                                PCM_OUT
                                      A(10)                 A3   A_A10                                                                                                     SPCLK1_PIO18        M18
                                                                                                                                                                                                                                PCM_CLK
                                      A(11)                 B3   A_A11                                                                                                                INT0     T15
                                                                                                                                                                                                                                DSP_INT
                                      A(12)                 B1   A_A12                                                                                                                   IO    W6                               DSP_IO
                                      A(13)                 D6   A_A13                                                                                                               RWN       V6
                                                                                                                                                                                                                                DSP_RWN               DSP_DB(0:15)
                                      A(14)                 D5   A_A14                                                                                                             D_D15       P11             DSP_DB(15)
                                      A(15)                 D3   A_A15                                                                                                             D_D14       N10             DSP_DB(14)
                                      A(16)                 E8   A_A16                                                                                                             D_D13       N9              DSP_DB(13)
                                      A(17)                 F8   A_A17                                                                                                             D_D12       N8              DSP_DB(12)
                                      A(18)                 E6   A_A18                                                                                                             D_D11       P9              DSP_DB(11)
                                      A(19)                 D2   A_A19                                                                                                             D_D10       P8              DSP_DB(10)
                                      A(20)                 E4   A_A20                                                                                                              D_D9       R9               DSP_DB(9)
                                      A(21)                 E3   A_A21                                                                                                              D_D8       T9               DSP_DB(8)
                                      A(22)                 F5   A_A22                                                                                                              D_D7       T8               DSP_DB(7)
                                      A(23)                 F4   A_A23                                                                                                              D_D6       U8               DSP_DB(6)
                                      A(24)                 F3   A_A24                                                                                                              D_D5       V8               DSP_DB(5)
                                                            F2   PIO35_A_A25_BOOTSEL                                                                                                D_D4       R8               DSP_DB(4)
       D(0:15)
                            D(0)                            A8   A_D0                                                                                                               D_D3       T7               DSP_DB(3)
                            D(1)                            E9   A_D1                                                                                                               D_D2       R7               DSP_DB(2)
                            D(2)                                                                                                                                                                                DSP_DB(1)
                            D(3)
                                                            F9
                                                           G10
                                                                 A_D2
                                                                 A_D3                                                     UCP300                                                    D_D1
                                                                                                                                                                                    D_D0
                                                                                                                                                                                               T6
                                                                                                                                                                                               U6               DSP_DB(0)                               DSP_AB(0:8)
                            D(4)                           G11   A_D4                                                                                                               D_A8       R6                           DSP_AB(8)
                            D(5)                           F11   A_D5                                                                                                               D_A7       N6                           DSP_AB(7)
                            D(6)                           E11   A_D6                                                                                                               D_A6       V4                           DSP_AB(6)
                            D(7)                           G12   A_D7                                                                                                               D_A5       T5                           DSP_AB(5)
                            D(8)                           D11   A_D8                                                                                                               D_A4       U4                           DSP_AB(4)
                            D(9)                           E12   A_D9                                                                                                               D_A3       V3                           DSP_AB(3)
                            D(10)                          C12   A_D10                                                                                                              D_A2       W3                           DSP_AB(2)
                            D(11)                          A12   A_D11                                                                                                              D_A1       W2                           DSP_AB(1)
                            D(12)                          F12   A_D12                                                                                                              D_A0       V1                           DSP_AB(0)
                            D(13)                          D12   A_D13                                                                                                             TEST3      V16
                            D(14)                          E13   A_D14                                                                                                             TEST2      T14
                            D(15)                          D13   A_D15                                                                                                             TEST1      U15      GND
                                                                                                                                                                                                                                           R304
                           TP_WEN                          D14   A_WEN                                                                                                   CPTSTSTOP_CKO        T17
    CP_WEN                 TP_OEN                          B14   A_OEN                                                                                                       ATDO_PWM2        T13      TDO
    CP_OEN                                                                                                                                                                                              TDI
                                                                                                                                                                                                                              CP_TDO
                                                           E14   PIO30_WAITN                                                                                                   ATDI_RTS1      L5                              CP_TDI
                                                           H14   FLASHRSTN                                                                                                    ATCK_CTS1       M4       TCK
FLASH_RESET                TP_ROM1_CS                      A14   A_CS0N                                                                                                      ATMS_PIO45       K12      TMS
                                                                                                                                                                                                                              CP_TCK
    ROM1_CS                                                C15                                                                                                                                P12
                                                                                                                                                                                                                              CP_TMS
                                                                 A_CS1N                                                                                                       PIO31_IRQ6
    ROM2_CS                                                G14   A_CS2N                                                                                                       PIO00_IRQ5      P16
                                                                                                                                                                                                                              R_RW
                                                                                                                                                                                                                              CARD_INS
                                                           J14   A_CS3N                                                                                                              IRQ4     P18
                           TP_RAM1_CS                      D15   A_CS4N                                                                                                              IRQ3     P17
   RAM1_CS                                                                                                                                                                                                                    MV_INT
                                                                      KEYBRD5_PSW1_BUF




                                                           C16   A_CS5N                                                                                                              IRQ2
                                                                      PIO43_MCI_DAT0_EN




                                                                                                                                                                                              M19
                                                                      PIO39_MCI_CMD_EN




                                                                                                                                                                                                                              JACK_IN
                                                                      PIO40_MCI_DAT_EN




                                                                      PIO20_SYSCLKREQ
                           TP_MV_CS                        F15   A_CS6N                                                                                                              IRQ1     M16
                                                                      PIO07_USB_SUSP




     MV_CS
                                                                      PIO37_USB_DATA




                                                                                                                                                                                                                              INTRQ
                                                                      PIO19_PWRKEEP
                                                                      PIO21_MCI_DAT0
                                                                      PIO22_MCI_DAT1
                                                                      PIO23_MCI_DAT2
                                                                      PIO24_MCI_DAT3
                                                                      PIO13_USB_VMO
                                                                      PIO36_USB_OEN
                                                                      PIO12_USB_VPO




                                                                      PIO08_MCI_CMD




                                                           B17
                                                                      PIO11_USB_VMI




                                                                      PIO38_MCI_CLK




                                                                 A_CS7N                                                                                                             PIO47
                                                                      PIO09_USB_VPI




                                                                                                                                                                                              J16                             MODE_SELECT
                                                                      PIO42_IRDARX
                                                                      PIO14_SIMRST




                                                                      PIO41_IRDATX
                                                                      SPTXD0_I2SD




                                                           H16        PWM1_PIO46
                                                                 A_BE0N                                                                                                             PIO34     R14
                                                                      RTCALARMN
                                                                      DCD0_PIO44
                                                                      DSR0_PIO02
                                                                      DTR0_PIO03




LOWER_BYTE
                                                                      RTS0_PIO04



                                                                      CTS0_PIO29




                                                                                                                                                                                                                              USB_CON
                                                                      OSC32OUT
                                                                      RX0_IRQ28




                                                                      RX1_IRQ28




                                                                      KEYBRD10
                                                                      KEYBRD11




                                                                                                                                                                                              U18
                                                                      RIO_PIO01




                                                           A17   A_BE1N                                                                                                             PIO33
UPPER_BYTE
                                                                      KEYBRD0
                                                                      KEYBRD1
                                                                      KEYBRD2
                                                                      KEYBRD3
                                                                      KEYBRD4

                                                                      KEYBRD6
                                                                      KEYBRD7
                                                                      KEYBRD8
                                                                      KEYBRD9




                                                                                                                                                                                                                              LCD_CON
                                                                      SPRXD0
                                                                      SPCLK0
                                                                      SIMCLK




                                                                      X1RTC
                                                                      X2RTC
                                                                      SPFS0




                                                                      PIO10
                                                                      PIO25
                                                                      PIO26
                                                                      PIO27
                                                                      PIO28
                                                                      PIO32
                                                                      SIMIO




                                                                      TX0




                                                                      TX1
                                                                       P4
                                                                       T2
                                                                       P5
                                                                     B19
                                                                     C19
                                                                     C18
                                                                     D17
                                                                     E16
                                                                     F16
                                                                     E17
                                                                       R3
                                                                       R4
                                                                       U2
                                                                       T3
                                                                       P3
                                                                       P2
                                                                       N4
                                                                       N2
                                                                      M3
                                                                      M1
                                                                      M6
                                                                       N5
                                                                     R16
                                                                     R17
                                                                       K7
                                                                       L6
                                                                       J7
                                                                       J6
                                                                       J5
                                                                       J4
                                                                       J8
                                                                       H6
                                                                       H4
                                                                       H1
                                                                       H3
                                                                       G6
                                                                       G4
                                                                       H2
                                                                      J15
                                                                     J13
                                                                     K13
                                                                     L12
                                                                     L13
                                                                     L15
                                                                     L14
                                                                     M14
                                                                     N14
                                                                     H19
                                                                     F19
                                                                     H17
                                                                     G16
                                                                     P15
                                                                     P19
                                                                       G5
                                                                     V17
                                                                     V19
                                                                     U16
                                                                     U19
                                                                     W17
                                                                     R13

                                                 SIMCLK
                                                SIMDATA                                                                                                                                                                     CHG_OFF
                                                 SIMRST                                                                                                                                                                     EAR_SWITCH
                                                                                                                                                                                                                            MVCORE_ON
                                                                                                                                                                                                                            MP3_ENABLE
                                               USB_SUSP                                                                                                                                                                     MIC_AMP_EN
                                                USB_DET
                                              D_SCL_HPE
                                                USB_VPO
                                                USB_VMO
                                                USB_OEN
                                               USB_DATA
                                                                                                                                                                                                                            DAC_RESET
                                                UP_SCLK                                                                                                                                                                     SUB_BATT_SW
                                                 UP_SDO                                                                                                                                                                     XOENAQ
                                                  UP_SDI                                                                                                                                                                    PWR_KEEP
                                                  UP_CS                                                                                                                                                                     CLK32K
                                              USB_ON                                                                                                                                                                        RTCALARM
                                                 AMP_EN
                                              D_SDA_HPE

                                                 BT_CTS
                                                 BT_TXD                                                                                                  C317               C318
                                                 BT_RXD
                                                 BT_RTS
                                                  BT_EN

                                                                                                                                                                   OSC300


                                              RADIO_SEL                                                                                                                                                                     CHG_DET
                                                 VIB_EN                                                                                                                                                                     MP3_SDA
                                               SDS_TXD                                                                                                                                                                      MP3_SCL
                                               SDS_RXD                                                                                                                                                                      CF

                                          KEY_COL(0:4)                                                                                                                                               HPEIO_1.8V
                                                                        KEY_COL(0)
                                                                        KEY_COL(1)
                                                                        KEY_COL(2)
                                                                        KEY_COL(3)
                                                                        KEY_COL(4)


                                              PSW1_BUF
                                                                                                                                                                                                     R323     R324

                                          KEY_ROW(0:4)
                                                                            KEY_ROW(0)                                                                                                                                      D_SCL
                                                                            KEY_ROW(1)                                                                                                                                      D_SDA
                                                                            KEY_ROW(2)                                                                                                                                      MV_RST
                                                                            KEY_ROW(3)                                                                                                                                      VBUS_GPIO
                                                                            KEY_ROW(4)                                                                                                                                      FLIPPER_USB


                                                                                                                                                                 R325

                                                                                              R326
                                                                                                     R327




                                                                                                                      3-5
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Flow Chart of Troubleshooting




                                                       3-6
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                                                                                    Flow Chart of Troubleshooting




3-1-3. Charging




      Abnormal charging part




          The pin #19,20                           NO
            of IFC 502                                             Replace TA, Check IFC502
            VEXT ≥ 5V?


                        YES


             The pin #5                            NO
             of U200 is                                                 check the U200,R255
               "low"?


                        YES



         The pin #10 of U200                          NO
             3.5 ~ 4.2V?                                                    check the U200


                          YES


          The pin #4 of U839                          NO
                   is                                                        check the U839
                "High"?


                          YES

                  END




                                                3-7
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                                                       3-8
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                                                                 Flow Chart of Troubleshooting




                             3-9
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                                                                                       Flow Chart of Troubleshooting




3-1-4. Sim Part



         "Insert SIM" is displayed on the LCD




                   The voltage is 2.8V                            NO
                                                                                         Check the U838
               at the pin #6 of SIM200?


                              YES




                   Is there any signal                            NO
                                                                                 Check the U838 & UCP300
                  pin #1,2,4 of SIM200 ?


                              YES




                  Check the SIM Card




                          END




                                                   3-10
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Flow Chart of Troubleshooting




                                                                                             SIM200

      SIM_IO                                                                                1 1
    SIM_CLK                                                                                2 2
                                                                                           3 3
     SIM_RST                                                                               4 4
                                                                                           5 5
          VSIM                                                                             6 6
                                                                                           7
                                                                                             NC
                                                                                           8
                                                                                             NC

                                C208         C204        C205        C206         C207




                                                       3-11
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                                                                                        Flow Chart of Troubleshooting




3-1-5. Speaker Part

            There is no sound from speaker




                                                              NO
              Is the terminal of speaker O.K?                             Replace the speaker

                                 YES


                      Are there any signal                    NO
                at the pin #1, 3 of CN400?                                    Check the CN400


                                 YES



                                          Are there any signal at the
                                           pin #J4,J5 of UCD400?
              YES                                                                          NO


         the voltage of L400 is 3.3V?                                         check R414, R415?
                                                 NO
                YES
                                                 Check U202


               the voltage of              NO
               C247 is 1.8V?                           Check U208

                 YES




         Are there any signal at the pin        NO
            #G8,F9,G9 of UCD400?                       Check UCP400



                 YES



                 Check U838



                      END




                                                     3-12
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Flow Chart of Troubleshooting




                         VBAT




                                          L401


                                                                  B1       A2
                                                                                                                             L402
                                                                  VDD         VSS
                                                                                       VOM    A3
                                                                                                                                                                   SAPA_N
                                                                          U403
                      C450         R442                    A1    VIP                   PVSS   B3
   DAC_SPKP




                                                                           PVDD
                      C451         R443                    C1    VIM                   VOP    C3
   DAC_SPKM                                                                                                                                                        SAPA_P




                                                                       C2 EN

                                                                          NC
                                                                                  NC
                                                                                                                             L403
                                                                              1 2




                                                                       B2
                                                                                                                                           C453         C452
     AMP_EN
                                                                                                              R446

                                                                                                                      R447
                                  R448
                                                         TA400
                                                                   C458




                                                         VBAT




                                           C448   C449
                                                                                                     U401

                                                                                         1 V+                NO2 10                                       SAPA_N

                                                                                         2 NO1              COM2 9
          SAPA_P                                                                                                                                        SPK_N

                                                                                         3 COM1              IN2 8
              SPK_P

                                                                                         4 IN1               NC2 7
          AMP_EN                                                                                                                                         AOUTAN

                                                                                         5 NC1              GND 6                      R444
         AOUTAP
                                R445                                                                 GND
                                                                                                   11




                                                                       C454                                                         C455




                                                                                                                                                        CN400
                                                                                                                                                  1    1    2 2
                                                                                         SPK_P
                                                                                                                                                  3    3    4 4
                                                                                         SPK_N
                                                                                                                                                  5    5    6 6
                                                                                       MOT_3.3V
                                                                                                                                                  7    7    8 8
                                                                                                                                                  9    9 10 10
                                                                                                                                                      NC NC
                                                                                                                                                      11 12




                                                                                        3-13
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                                                                 Flow Chart of Troubleshooting




                             3-14
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3-1-6. Camera Part


    Camera function does not work




                                               NO
     Check the connect CN503?                                  Connect the CN503

                    YES


                                               NO
       Pin #5 of U208= 1.8V?                                 Check the U208&L201


                    YES

                                                                          YES

                                             NO                                                 NO        Check
       Pin #4 of U205 = 2.8V?                                Pin #1 of U205 = High?
                                                                                                         UCP300

                    YES



                                             NO                 Replace OSC400
      Pin#3 of OSC400 is 24MHz?
                                                               and check UCP300

                     YES




      Is that clock signal at the         NO
            pin #3 of CN503?


                     YES



                                            NO              Check
      Pin#13 of CN503 is High?                             UCP400




                END




                                                    3-15
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Flow Chart of Troubleshooting




                                                                                                 VCAM_2.8V



                                                                                               L500




                                                                                                                        VCAM_1.5V




                                                                                      C510
 CAM_MCLK                                                                                                                                                                                           Y(7)
  CAM_SCL                                                                                                                                                                                           Y(6)

  CAM_SDA                                                                                                                                                                                           Y(5)
    HSYNC                                                                                                                                                                                           Y(4)
CAM_RESET
    VSYNC                                                                                                                                                                                           Y(3)
      Y(0)                                                                                                                                                                                          Y(2)
      Y(1)                                                                                                                                                                                          CAM_PCLK




                                                                              BLM15AG102SN1D
                                    C513   C514   C515   C516   C517   C518                                                  C519   C520
                                                                                                                                                                                             C527




                                                                                                                                                   VR543


                                                                                                                                                           VR544


                                                                                                                                                                    VR545


                                                                                                                                                                             VR546


                                                                                                                                                                                     VR547
                                                                                                                                       VR542
                     VR540




                                                                                                      L501




                 VBAT               VLDO_1.5V                                                                 HPEIO_1.8V
                       1
               2

                             F200




                                                            U208
                       3




                                                                                                       L201
                                                    1 VIN              SW 5
                                                    2 GND

                                                    3 EN               FB 4

                                                                                                                      C247
             TA205




                                                                                                                        VBAT                                                         VCAM_2.8V




                                                                                                                                                           U205
                                                                                                                                               3   VIN
                                                                                                                                                                            VOUT     4
                                                                                                                                               2   GND
                                                                                                                                                                             NC
                                                                                                                                                                                     5
                                                                                                                                               1   STBY
                                                                              VCAM_EN
                                                                                                                                                                   GND
                                                                                                               C245                                                6                                C243




                                                                                                         3-16
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                                                                 Flow Chart of Troubleshooting




                             3-17
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Flow Chart of Troubleshooting




3-1-7. Mp3 Part


       There is no MP3 sound from Earphone




               Are there any signal                         YES
           at the pin #9 of CN502?                                                  Replace the Earphone


                        NO



                Are there any signal                        YES                             Check C422, C423
           at the pin #5,7 of CN502?                                                        and VR526, VR527

                         NO



                  Are there any signal                      YES                                                YES
                                                                                      The voltage of L400            Check
           at the pin #C8,D8 of UCD400?                                                                              UCD400
                                                                                           is 3.3V?

                         NO
                                                                                                  NO


                                                            NO                                                 YES
            The voltage of C237                                                          The voltage of               Check
                   is 3.3                                                                R213 is 1.8                  U202

                         YES                                                                      NO


               Check the UCD400
                                                                                          Check U838




              Check the CN502                                                                   END




              Check the UCP300




                     END




                                                            3-18
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                                                                                                                                                                                                                                                              Flow Chart of Troubleshooting




                                                                                                                                                                                                       DAC_3.3V




                                                                                                                                                                                       HPEIO_1.8V

                                                                                                                                                                                                                     L400




                                                                                                                                                                                C459

                                                                                                                                                                                         C420




                                                                                                                                                                                                                  C418

                                                                                                                                                                                                                            C419

                                                                                                                                                                                                                                   C421
              VCCA_2.8V




                                                                                                                                                                                            C9
                                                                                                                                                                                            B1
                                                                                                                                                                                            C1
                                                                                                                                                                                            H1
                                                                                                                                                                                            H9
                                                                                                                                                                                            J1
                                                                                                                  C424

                                                                                                                                 C425




                                                                                                                                                                                                  VDDA 1
                                                                                                                                                                                                  VDDA 1
                                                                                                                                                                                                  VDDA 1

                                                                                                                                                                                                A VDDA 2
                                                                                                                                                                                                  IOVDD




                                                                                                                                                                                                   DVDD
                                                                                                                                                                           J6                                               G1                                                    C422
                                                                                                                                                                                       RIGHT_LOP             HPROUT                                                                         IF_EAR_R
                                                                                                                                                                           J7                                               F1
                                                                                                                                               R415                                    RIGHT_LOM             HPRCOM
                                                                                                                                                                           J4                                               D1
                                                            DAC_SPKP                                                                                                                   LEFT_LOP              HPLOUT                                                                         IF_EAR_L
                                                                                                                                               R414                        J5                                               E1                                                C423
                                                            DAC_SPKM                                                                                                                   LEFT_LOM              HPLCOM
               TA 401




                                                                                                                                                                           J2
                                                            CSP_MICP                                                                                                                   MONO_LOP
                                                                                                                                                                           J3                                               J8
                                                            CSP_MICN                                                                                                                   MONO_LOM             GPIO2
                                                                                                                                                                                                                            J9
                                                                                                                                                                                                            GPIO1
                                                                                                                                                                           B2
                                                                                                                                                                                       MICDET
                                                                                                                                                                           A2                                               F8
                                                                                                                                                                                       MICBIAS               DOUT                          D_SDIN
                                                                                                                                                                           A1                                               E9
                                                                     FMA_R                                                                                                             MIC3R                   DIN                         D_SDOUT
                                                                                                                                                                           B3
                                                                     FMA_L                                                                                                             MIC3L
                                                                                                                                                                                                                            E8
                                                                                                                                                                                               UCD400     SELECT
                                                                                                                                                                           A9                                               D8
                                                                                                                                                                                       MFP3                   SDA                          D_SDA
                                                                      C428                                                                                                 A8               TLV320AIC33IZQER                C8
                                                                                                                                                                                       MFP2                   SCL                          D_SCL
                                                                      1UF                                                                                                  B9                                               H8
               MICP                                                                                                                                                                    MFP1                /RESET                          DAC_RESET
                                                                                                                                                                           B8                                               G8
                                                                                                                                                                                       MFP0                  MCLK                          D_MSCK
                                 C429                                                                                                                                                                                       F9
                                                                                                                                                                                                            WCLK                           D_LRCK
                                                                      C430                                                                                                 B4                                               G9
                                                                                                                                                                                       LINE2RP               BCLK                          D_BCK
                                                                      1UF                                                                                                  A3
              MICN                                                                                                                                                                     LINE2RM
                                                                                                   C432                          R416                                      A4                                                1
                                                                          AOUTBP                                                                                                       LINE2LP                 NC
                                                                                                                                                                           B5                                                2
                                                                          AOUTBN                        C431                     R417                                                  LINE2LM                 NC
                                                                                                                                                                           B7                                               A7
                                                                                                                                                                                       LINE1RP                 NC
                                                                                                                                                                           B6
                                              C436                   C437                                                                                                              LINE1RM
                                                                                                                                                                           A6
                                                                                                                                                                                                A VSS_A DC
                                                                                                                                                                                                A VSS_DA C
                                                                                                                                                                                                A VSS_DA C
                                                                                                                                                                                                A VSS_A DC




                                                                                                                                                                                       LINE1LP
                                                                                                                                                                           A5
                                                                                                                                                                                       LINE1LM
                                                                                                                                                                                                DRVSS
                                                                                                                                                                                                DRVSS
                                                                                                                                                                                                DVSS
                                                                                                                                                         C433

                                                                                                                                                                   C434




                                                                                                                                                                                            G2
                                                                                                                                                                                            D9




                                                                                                                                                                                            D2
                                                                                                                                                                                            H2
                                                                                                                                                                                            C2
                                                                                                                                                                                            E2
                                                                                                                                                                                            F2




                                                                                                                                                  VCCD_2.8V
                                                                                                                                         HPEIO_1.8V
                                                                                                                                                                           USB_5V VBAT



                                                                                                                                                        R504
                                                                                                                         R505             R506

                                                                                                                                                        180K
                                                                                                                         100K             100K
                                                                                                                                                                                                                                   HPEIO_1.8V
                                                              R507




                                                                                                                                                                                                             CN502
                                                                                                                                                                                                                                                     VBAT                                  DAC_3.3V
                                                                                                                                                                                                         1
    FM_ANT                                                                                                                                                                                               2
                                                                                                                                                                                                             1
                                                                                                                                                                                                             2
                                                                                                                                                                                                         3
 EAR_MIC_P                                                                                                                                                                                               4
                                                                                                                                                                                                             3
 EAR_MIC_N                                                                                                                                                                                               5
                                                                                                                                                                                                             4
  IF_EAR_R                                                                                                                                                                                               6
                                                                                                                                                                                                             5
                                                                                                                                                                                                             6
                                                                                                                                                                                                         7
   IF_EAR_L
EAR_SWITCH
                                                                                                                                                                                                         8
                                                                                                                                                                                                             7
                                                                                                                                                                                                             8
                                                                                                                                                                                                                                          R213
                                                                                                                                                                                                                                                                           U202
                                                                                                                                                                    R508                                 9
    JACK_IN                                                                                                                                                                                                  9
   EAR_ADC
                                                                                                                                                                    R509                                10
                                                                                                                                                                                                        11
                                                                                                                                                                                                             10                                                    3 VIN
      T_OPT                                                                                                                                                                                                  11
   SDS_RXD
                                                                                                                                                                    R510
                                                                                                                                                                                                        12
                                                                                                                                                                                                        13
                                                                                                                                                                                                             12                                                              VOUT 4
                                                                                                                                                                                                        14
                                                                                                                                                                                                             13
                                                                                                                                                                                                             14
                                                                                                                                                                                                                                                                   2 GND
                                                                                                                                                                    R511                                15

                                                                                                                                                                                                                                                                                    NC 5
  JIG_ON_IF                                                                                                                                                                                             16
                                                                                                                                                                                                             15
    USB_D+
     USB_D-
                                                                                                                                                                                                        17
                                                                                                                                                                                                        18
                                                                                                                                                                                                             16
                                                                                                                                                                                                             17                                                    1 STBY
                                                                                                                                                                                                             18
   TA_VEXT
                                                                                                                                                                                                        19
                                                                                                                                                                                                        20
                                                                                                                                                                                                             19                                                            GND
                                                                                                                                                                                                             20
                                                                                                                                                                                                        21           25
                                                                                                                                                                                                        22
                                                                                                                                                                                                             NC
                                                                                                                                                                                                             NC
                                                                                                                                                                                                                  NC
                                                                                                                                                                                                                  NC
                                                                                                                                                                                                                     26                                     C236           6                           C237
                                                                                                                                                                                                        23           27
                                                                                                                                                                                                             NC   NC
                                                                                                                                                                                                        24           28
                                                                                                                                                                                                             NC   NC


               ZD503                                                                                                                                                        C528
                                                                                                                                                                   C529
                          R512




                                                                                                                                                                                                C530
                                                                                                                                        C531
                                    VR520



                                            VR521


                                                    VR522



                                                             VR523



                                                                       VR524



                                                                                VR525


                                                                                        VR526



                                                                                                VR527



                                                                                                          VR528



                                                                                                                         VR529




                                                                                                                                                           ZD504
                                                                                                                                                ZD505




                                                                                                                                                                                          3-19
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Flow Chart of Troubleshooting




                                                       3-20
                          SAMSUNG Proprietary-Contents may change without notice
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                                                                                           Flow Chart of Troubleshooting




3-1-8. External Battery




                   The SGH-F300 does not detect
                        the external battery


             Check the state of the 3-pin connector
 between SGH-F300 and External battery, External battery voltage.




                 Check the state of 3-pin connector        NO
                                                                                  Replace the external battery
                    In external battery is OK?



                                      YES


                        Check the voltage of
                         External Battery                  NO
                                                                                  Replace the external battery
                            Vext > 3.2 ?

                                      YES


                        Check the voltage of
                         External Battery                  NO
                                                                                Replace the 3-pin connector in SGH-F300
                            Vext > 3.2 ?

                                      YES

                               END




                                                       3-21
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Flow Chart of Troubleshooting




                                                                                           G N D V f V ex t

                                                                                     Pin A r r ay of ex ter nal
                                                                                               batter y




                                                                      T he 3-pin connector of S G H -F300



                                                                      T he 3-pin connector of ex ter nal
                                                                              batter y




                                                       3-22
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                                                                                       Flow Chart of Troubleshooting




3-1-9. BLUETOOTH


       BT connection disable




       check BT function ON                                Check the S/W




      Is the Antenna of BT OK?                            Change BT Antenna




      check the BT_EN R120
           R120 is High?                                   replace UCP300




        Is the voltage 1.8V
    at C140 or at pin#3 of U103                            Change BT Antenna




                 END




                                                   3-23
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Flow Chart of Troubleshooting




                                                       3-24
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Flow Chart of Troubleshooting




                Layout




        ㅠㅂ




                                                       3-25
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                                                                                               Flow Chart of Troubleshooting




3-2.RF
3-2-1. EGSM RX

      Continuous RX ON
       RF Input : 62 CH
        AMP : -50dBm




    NORMAL CONDITION                            NO
                                                                    Check soldered status of
     Catch the channel ?                                                      R121

                  YES


         DUF100 Check                           NO
                                                                    RFS100, C103, L100
     Pin #13 ≥ -65dBm ?                                             Resolder or Change

                  YES


         DUF100 Check                           NO
    Pin #5,6 ≥ -65dBm ?                                        DUF100 Resolder or Change


                  YES


                                                NO
            U100 Check                                            Check soldered status of
      Pin#6, 7 ≥ -65dBm ?                                             L102, L103, C112


                  YES


               U100 Check
                                                NO                             C106
         Pin#34 =Clean 2.8V?
                                                                          Check or resolder

                  YES


            U100 Check             NO
    Pin#35,36,37,38=100mV?


                  YES

                                                                                                                             NO
                                                          NO                                   NO
                                          U100 Check                      R113 = 26MHz ?
                                     Pin #21 : 26MHz ?                      Vpp = 1.2V?                     R111 = 2.8V ?
                                          Vpp : 1.1V?

                                               YES                                 YES                             YES



                                          U100                            C125, C129                        TCX100
                                    Change or resolder                     resolder                     Change or resolder




          Check U838




                                                           3-26
                           SAMSUNG Proprietary-Contents may change without notice
                               This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting




3-2-2. DCS RX

         Continuous RX ON
         RF Input : 660 CH
           AMP : -50dBm




        NORMAL CONDITION                           NO
                                                                     Check soldered status of
         Catch the channel ?                                                   R121

                    YES



            DUF100 Check                           NO                RFS100, C103, L100
         Pin #13 ≥ -65dBm ?                                          Resolder or Change


                    YES


           DUF100 Check                            NO
        Pin #3,4 ≥ -65dBm ?                                      DUF100 Resolder or Change


                    YES



             U100 Check                           NO
                                                                    Check soldered status of
         Pin#8,9 ≥ -65dBm ?                                              L104, L105


                    YES



           U100 Check                              NO                            C106
         Pin#34 =Clean 2.8V?                                                Check or resolder


                    YES


             U100 Check              NO
        Pin#35,36,37,38=100mV?


                    YES

                                                                                                                          NO
                                          U100 Check        NO                                  NO
                                       Pin #21 : 26MHz ?                  R113 = 26MHz ?
                                                                            Vpp : 1.2V?               R111 = 2.8V ?
                                           Vpp : 1.1V?

                                                 YES                                YES                         YES


                                           U100                            C125, C129                     TCX100
                                      Change or resolder                    resolder                 Change or resolder




            Check U838




                                                             3-27
                               SAMSUNG Proprietary-Contents may change without notice
                                 This Document can not be used without Samsung's authorization
                                                                                                 Flow Chart of Troubleshooting




3-2-3. PCS RX

      Continuous RX ON
      RF Input : 660 CH
        AMP : -50dBm




    NORMAL CONDITION                          NO
                                                                     Check soldered status of
     Catch the channel ?                                                       R121

                 YES



        DUF100 Check                          NO                  RFS100, C103, L100
     Pin #13 ≥ -65dBm ?                                           Resolder or Change

                 YES



       DUF100 Check                           NO
    Pin #8,9 ≥ -65dBm ?                                      DUF100 Resolder or Change


                 YES



        UCP100 Check                          NO                Check soldered status of
     Pin#1,2 ≥ -65dBm ?                                                L106, L107

                YES


         U100 Check                           NO                              C106
     Pin#34 =Clean 2.8V?                                                 Check or resolder

                YES


         U100 Check              NO
    Pin#35,36,37,38=100mV?


                YES


                                   U100 Check          NO                                                                    NO
                                                                    R113 = 26MHz ?              NO
                                Pin #21 : 26MHz ?                                                           R111 = 2.8V ?
                                    Vpp : 1.1V?                       Vpp : 1.2V?

                                           YES                                 YES                                 YES



        Check U838                    U100                            C125, C129                             TCX100
                                Change or resolder                     resolder                         Change or resolder




                                                         3-28
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                             This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting




                                                                                                                                                                                                                                                           TP




                                                                                                                                                                                                                                         R121
                                                                                                                                                                                                                                                                               ANT


                                                                                                                                                                                                                                 C101           C102
         VBAT
                                                                                                                                                                                                                                                           TP




                                                                                                                                                                                                                                    C103
                                     RTX_QP                                                                                                                                        GSM74137_OUT
                         VRF_2.8V    RTX_QN                                                                                                                                        DCS74137_OUT
                                      RTX_IN
                                      RTX_IP
                                    MOD_SEL                                                                                                                                                                                       L100
                                                            32

                                                                     33
                                                                                34

                                                                                                     35
                                                                                                                 36

                                                                                                                            37
                                                                                                                                       38
                                                                                                                                              39

                                                                                                                                                        40
                                                                                                                                                               41




  C105
                                                               L OM ON




                                                                                                                                                            GN D
                                                                                                         IM| TX_IM

                                                                                                                     QM|TX_QM
                                                                                    IP|TX_IP




                                                                                                                                QP|TX_QP
                                                        VCC3



                                                                         VDIGEN A




                                                                                                                                           TXL B
                                                                                                                                                   TXH B




                              C106
                                         31                                                                                                                                          1
            C107 C108                         NC                                                                                                                            VCC1
                                         30
                                              NC                                                                                                                           TXENA
                                                                                                                                                                                     2
                                                                                                                                                                                                   TX_EN
                                         29                                                                                                                                          3
                                              NC                                                                                                                             VPC                   VPC
                                         28                                                                                                                                          4
                                              NC                                                                                                                     850LNA_N
                                         27                                                                                                                                          5
                 XOENA                        CHIPENA                                                                                                                850LNA_P

                 SX_EN
                                         26
                                         25
                                              SXENA                                 U100                                                                             900LNA_N
                                                                                                                                                                                     6
                                                                                                                                                                                     7
                                                                                                                                                                                                                                                                              GSM_TX_EN
                SERCLK                   24
                                              CLK                                                                                                                    900LNA_P
                                                                                                                                                                                     8
                                                                                                                                                                                                                                                                              DCS_TX_EN
                 SERLE                   23
                                              LATCHENABLE                                                                                                          1800LNA_N
                                                                                                                                                                                     9
                SERDAT
                                                                                    13MHZ_26MHZ| XB UF




                                              DATAIN                                                                                                               1800LNA_P
                                         22                                                                                                                                         10
                                         21
                                              VCC2                                                                                                                 1900LNA_N
                                                                                                                                                                                    11
                                                                                                                                                                                                                  L102                                                        GSM_OUT
                CLK26M                        XTAL                                                                                                                 1900LNA_P                                                                                                  DPCS_OUT
                                                                                                         L PFAD J

                                                                                                                     COMPN
                                                                                                                                COMPP



                                                                                                                                                   TXRFIN



                                                                                                                                                                   RXENA
                                                                         XTUNE




                                                                                                                                           VA PC



                                                                                                                                                            VCC4




                                                                                                                                                                                                                 L103    C112




                                                                                                                                                                                                                                                                C113

                                                                                                                                                                                                                                                                       C115
                                                                                20

                                                                                                     19
                                                                                                                 18

                                                                                                                            17
                                                                                                                                       16
                                                                                                                                              15

                                                                                                                                                        14
                                                                                                                                                               13

                                                                                                                                                                       12




                                       C114
                                                                                                                                                                                                                 L104
                                                                                                                                                                                                  RX_EN
                                                                                                                                                                                                  TX_FB
                                                                                                                                                                                                  VAPC
                                                                                                                                                                   R108                                                  C117
                                                                                                                                                                                                                 L105
                                                                                                R107




                                                                                                                                                                                                  SAT_DET

                                                                                                                                                                                                                 L106
                                                                                                                                                                                         C121
                                                                                                                                                              C122
                                                                                                                                              C124




                                                                                                                                                                                                                         C123
                                                                                                                                                                                                                 L107



                  13M_BUF




                                                                                                                                                                                                          VRF_2.8V




                                                                                                                                                                                                      R111




                                      R112
          AFC
                                                                                                                                                                                                                          C125             R113
                                              C126                                                                                                                                                                                                     CLK26M
                                                                                                                                                                                                               C129




                                                                                                                                                                                                               3-29
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                                                                                                               This Document can not be used without Samsung's authorization
                                                                 Flow Chart of Troubleshooting




                             3-30
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 This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting




3-2-4. EGSM TX


     DUF100 Pin#13           NO               DUF100                     NO
                                                                                       U838
     About 2~3 dBm?                        Pin#11 = High?                         Check & Change

             YES                                         YES


      DUF100, C103                NO           Level of
     Check & Change                        DUF100 Pin#10 is
                                              4~5dBm ?                                                  Continuous TX ON condition
                                                                                                         TX Power Code : 500 code Applied
                                                                                                                          CH : 62
                                                         YES                                                          RBW : 100KHz
                                                                                                                      VBW : 100KHz
                                               DUF100                                                                 SPAN : 10MHz
                                           Check & Change                                                           REF. Level : 10dBm
                                                                                                                        ATT. : 20dB


                          C120            NO
                                                          Check the
                         >= 3.7V?                        Battery Block

                              YES


                      Level of PAM100          NO                  Check                   NO               U838
                         Pin #6 is                             U838 TXP OK ?                           Check & Change
                           1.2V?

                              YES                                YES


          YES         PAM100 pin#12
                      About -5 dBm?

                               NO


                       PAM100 pin#7        NO
                          High ?                          Check U838

                              YES

                      Change PAM100




                                                         NO
                      C106 ≥ 2.8V ?                                           C105,107,108,U838
                                                                              Check or resolder

                                    YES


                          U100 Check                NO                                            NO                                 NO
                       Pin #21 : 26MHz ?                            R113 = 26MHz ?                             R111 = 2.8V ?
                           Vpp : 1.1V?                                Vpp : 1.2V?

                                    YES                                          YES                                    YES

                                                                       C125, C129                                TCX100
            NO             U100 Pin                                     resolder                            Change or resolder
                          #34, = 2.8V?


                                  YES


     Check U838         Change PAM100




                                                                       3-31
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                               This Document can not be used without Samsung's authorization
                                                                                                             Flow Chart of Troubleshooting




3-2-5. DCS/PCS TX


    DUF100 Pin#13          NO                     DUF100               NO
                                                                                     U838
  About 2~3 dBm?                             Pin#9 = High?                      Check & Change

           YES                                         YES


   DUF100, C103                 NO             Level of
  Check & Change                          DUF100 Pin#8 is
                                              4~5dBm ?                                                Continuous TX ON condition
                                                                                                       TX Power Code : 500 code Applied
                                                                                                                       CH : 698
                                                       YES                                                          RBW : 100KHz
                                                                                                                    VBW : 100KHz
                                              DUF100                                                                SPAN : 10MHz
                                          Check & Change                                                          REF. Level : 10dBm
                                                                                                                      ATT. : 20dB


                         C120           NO
                                                        Check the
                       >= 3.7V?                        Battery Block

                            YES


                    Level of PAM100          NO                    Check                 NO               U838
                         Pin #6 is                           U838 TXP OK ?                           Check & Change
                            1.2V?

                            YES                                YES


        YES          PAM100 pin#14
                     About -5 dBm?

                             NO


                                          NO
                     PAM100 pin#2                       Check U838
                         High ?

                            YES

                    Change PAM100




                         C106 ≥ 2.8V ?                 NO
                                                                            C105,107,108,U838
                                                                            Check or resolder

                                  YES


                           U100 Check             NO                                            NO                                 NO
                      Pin #21 : 26MHz ?                                R113 = 26MHz ?                         R111 = 2.8V ?
                           Vpp : 1.1V?                                   Vpp : 1.2V?

                                  YES                                          YES                                    YES

                                                                     C125, C129                                TCX100
         NO                  U100 Pin                                 resolder                            Change or resolder
                           #34, = 2.8V?


                                YES


   Check U838         Change PAM100




                                                                     3-32
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Flow Chart of Troubleshooting




                                                        VBAT


                                                                             PAM100
                                                                  1 ENA             COUP_OUT 16                                    R100
      PAC_EN                                                                                                                                     TX_FB
                 C104                                             2 DCS|PCS_IN           GND 15
  DCS74137_OUT
                                                                  3 BS            DCS|PCS_OUT 14   R101
      BAND_SEL                                                                                                          DPCS_OUT
                                                                  4 VSUP                 GND 13
                                                                  5 VBATT            GSM_OUT 12    L101
                                                                                                                        GSM_OUT
                 R102                                             6 VPC                  GND 11
          VPC
                 C109                                             7 GSMIN                GND 10
  GSM74137_OUT
                 R103                                             8 RSVD                  GND 9
      SAT_DET




                                                                                                          C110

                                                                                                                 C111
                                                                                  GND




                                                                                                                                   R104




                                                                                                                                          R105
                                                                                  17
                                                R 109

                                                          C 118

                                                                  C 119


                                                                          C 120
                         R106




                                         C116
                                  R110




                                                                                      3-33
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Description: Samsung SGH-F300 Service Manual