Samsung SGH-F300 Service Manual page 22

Flow Chart of Troubleshooting
DSP_DB(0:15)
DSP_DB(15)
D2 DB15
DSP_DB(14) D3 DB14
DSP_DB(13)
E3 DB13
DSP_DB(12) E2 DB12
DSP_DB(11)
F3 DB11
DSP_DB(10) F2 DB10
DSP_DB(9) F1
DB9
DSP_DB(8)
F4 DB8
DSP_DB(7) G4
DB7
DSP_DB(6) G3
DB6
DSP_AB(0:8)
DSP_DB(5) H5
DB5
DSP_DB(4) J6 DB4
DSP_DB(3) J5
DB3
DSP_DB(2) K3
DB2
DSP_DB(1) K2 DB1
DSP_DB(0) K1
DB0
K5
DSP_AB(8) AB8
DSP_AB(7) K7
AB7
M1
DSP_AB(6) AB6
DSP_AB(5) M2
AB5
DSP_AB(4) N2
AB4
DSP_AB(3) N1 AB3
DSP_AB(2) L5 AB2
DSP_AB(1) P1
AB1
DSP_AB(0) K6
AB0
T_DSP_IO
L3
I|O
DSP_IO
L2
RWN
DSP_RWN
R205 R3 RESETN_CSP
FLASH_RESET
E6 OCTL0
C5
OCTL1
BAND_SEL
F5 OCTL2
MOD_SEL
E5
OCTL3
TX_EN
A4
OCTL4
XOENA
G6
OCTL5
SX_EN
B3 OCTL6
PAC_EN
A3
OCTL7
RX_EN
B1
SERLE1
A2
SERLE2
SERLE
C1
SERDA
SERDAT
C2
SERCK
SERCLK
R112
AFC
VCCA_2.8V
VRF_2.8V HPEIO_1.8V
C200
C202
EAR_ADC
U838
C126
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VCCD_2.8V
VBAT
C201
C209
VDD34
C11
VDD12 J13
UP_CLK N9
SIMCLK
UP_RST R10
SIMRST
UP_IO P10
SIMDATA
SIM_IO J11
SIM_IO
SIM_RST K11
SIM_RST
SIM_CLK K14
SIM_CLK
VSIM
K12
VSIM
VRTC H11
LED2_DRV G12 VCCB_2.9V
LED1_DRV G13
RING_DRV F13
VIB_DRV F15
VLDO_7 C12
VLDO_6 A14
VL5S_B
C9
VL5S_A D10
VLDO_5 B10
VL4S_B B11
C214
DCS_TX_EN
VL4S_A A12
GSM_TX_EN
VLDO_4 B12
VLDO_3 A13
VLDO_2 J12
VLDO_1 G11
VACC F14
TP_VACC
VBAT
TP_CSN_PSC
CSN_PSC K8
UP_CS
SCLK_PSC L8
UP_SCLK
SDO_PSC N7
UP_SDO
SDI_PSC M7
UP_SDI
VEXT E14
VBAT E13
CH_BDRV E11
CH_ISEN F12
CH_RES D14
ADC_AUX2 D15
ADC_AUX1
E10
VREF A10
CREF
E9
RTC_ALMNH10
R211
C230
VBAT
INTRQ
PWR_KEEP
RST
R214
VRF_2.8V
R111
C125
C129
3-2
VLDO_1.8V VCCA_2.8V VRF_2.8V
VCCD_2.8V
VLDO_1.5V
C215 C216
C217 C218 C219 C220
C221
VCCB_2.9V
ICHRG
TH200
R210
C228
RTCALARM
SUB_BATT
R113
CLK26M
VRTC_1.5V
R204
BAT200