Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung GSM 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◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo