Samsung SCH-i830 Service Manual page 32

Flow Chart of Troubleshooting
VBAT VBAT_PM6650
L900
L901
TA900
C901
TR901
VBUS VBUS_PM6650
R904
R905
R907
3
1
PS_HOLD
2
TR902
GSM_PA_PWR_CTL_REF
< USIM SOCKET >
PS_HOLD
IF_CON_SENSE
VREG_USIM
nPMIC_RESET
R917 R918
USIM_IO
USIM_CLK
USIM_RST
C924 C925 C927 C923
VCC_BATT
C939
1
PS_HOLD_P INA VCC
5
2
GND
3 4
nBATT_FAULT INB OUTY
U901
TR900
V_IN
< PHONE Power Management IC >
ZD900
R900
R901
IF_CON_SENSE
VBUS_PM6650
R902
R903
V_IN
9PF
R906
C902
VBAT_PM6650
C903
9PF
C904
OSC900
CC4V-T1
2
1
SLEEP_XTAL_IN
34
C905
TCXO
TCXO_EN
R910
TCXO_OUT
R913
AMUX_OUT
USB_OE_N
D901
C907
USB_DAT
USB_SEO
2
3
PHONE_D+
R914 0 1
PHONE_D-
R915
R916 0
SIM_IO
SIM_CLK
SIM_RST
PM_SBDT
PM_SBCK
PM_SBST
C926 C928
C929
PM_INT_N
R919
3
TR903
1
2
VCC_BATT
U902
1 NC 5
VCC
2
IN
PHONE_ON
3 4
GND OUT
PS_HOLD
C940
U803
1 INA
nMSM_RST
2
3
nPMIC_RESET
R862
C250
C252
OSC200
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U900
2 VCHG VSW_5V 14
16 USB_VBUS VREG_5V 12
3 ISNS_P VSW_PA 27
5 ISNS_M VREG_PA 28
4 CHG_CTL_N VSW_MSMC 31
L902
15 VREG_MSMC 32
USB_CTL_N
6 VBAT VSW_MSME 37
L903
TP900 60 VCOIN VREG_MSME 36
TP901 7 BAT_FET_N VREG_USB 10
48 VBACKUP VREG_MMC 39
TP902
VREG_RUIM 42
1 ADC_BYP VREG_MSMP 50 R908
44 XTAL_IN VREG_MSMA 56
46 XTAL_OUT VREG_WLAN 64
TP903
45 SLEEP_CLK VREG_RFRX2 67
58 TCXO_IN VREG_RFRX1 69
TP904 55 TCXO_EN VREG_RFTX 73 R909
53 TCXO_OUT VREG_SYNT 81
70 AMUX_IN1 VREG_TCXO 84 R911
72 AMUX_IN2 REF_ISET 61 R912
82 AMUX_OUT REF_BYP 63
80 REF_OUT REF_GND 62
C906
13 USB_OE_N FLSH_DRV_N 8
17 USB_DAT GP1_DRV_N 21
19 USB_SE0 22
LCD_DRV_N
11 USB_ID KPD_DRV_N 23
18 USB_D_P VIB_DRV_N 25
20 USB_D_M SPKR_IN_P 76
24 KPDPWR_N SPKR_IN_M 78
V_IN
57 PS_HOLD SPKR_OUT_P 75
66 CBL1PWR_N SPKR_OUT_M 79
R921
68 CBL0PWR_N SPKR_BYP 74
9 PON_RESET_N VDD_SPKR 77
30 RUIM_M_IO
26 RUIM_IO VDD_PA 29
34 RUIM_M_CLK VDD_MSMC 33
38 RUIM_CLK VDD_MSME 35
40 RUIM_M_RST VDD_RUIM 41
43 VDD_MSM 52
RUIM_RST
47 SBDT VDD_ANA 54
49 SBCK VDD_WLAN 65
51 SBST VDD_RF 71
59 MSM_INT_N VDD_MAIN 83
C931 C930 C932
C935 C936
C938
VREG_MSMP
C864
VCC
5
GND
4
INB OUTY RESIN_N
C247
C251
C253
7-6
VREG_MSMC VREG_MSME VREG_USIM VREG_MSMP VREG_MSMA VREG_RFRX
C908 C909 C910 C911 C912 C913
C941 C918 C919 C920
V_IN
C933 C934
C937
VREG_RFTX VREG_SYNT VREG_TCXO
C914 C915 C916 C917
C921 C922