Samsung GT-B2100 Service Manual page 52

MES_BATT
C301
VDD_IO_HIGH_2.9V
AVDD_2.6V
VDD_CAM_1.5V
VDD_USB_3.3V
VDD_PLL_1.2V
C313
OSC300
4
3
1 2
C316
TP_IT_PMU
IT_PMU
R309
SIMOFFn
RSTON
REF_ON_PMU
V_CORE_CTL
32KHz_DIGIT
C114
U100
C116
C117
C449
C329
R300
R306
C302
C306
C307
C309
C312
1
OSCI
2
OSCO
3
_IRQ
4
SIMCKHC
5
_SIMRSHC
6
PMU300
SIMIOHC|_SIMOFF
7
_RSTHC
8
GPO3
9
GPO2
10
GPO1
11
PWREN1
12
PWREN2
13
VSS
57
VSS
C509
C511
C512
RTS100
C136
C510 C514
TP500
C515
C310
R104
C308
U300
C304
TP402
C303
C447
C300
L411
C302
C306
C307
C450
C309
TP401 C312
OSC300
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VBAT
39
VSS
38
VCHG
37
USBVIN
R307
36
CHGCUR
35
_REC2
34
_REC1
33
VBATSENSE
C320
32
VISA
31
REFGND
C321
30
REFC
29
MICBIAS
28
_ONKEY
27
NTC
VDD_IO_LOW_1.8V
TP400
U405
C508
C322
C323
L504
L505
L507
L506
D509
10-15
Flow Chart of Troubleshooting
VDD_IO_LOW_1.8V
C300
VDD_SD_3.3V
C303
VDD_SIM_3.0V
C304
VDD_RX_TX_2.8V
C308
VCC_SYN_2.8V
C310
V_EXT_CHARGE
VBUS_5V
C315
C314
VBAT
JACK_IN
AUX_ON
R310
MIC_BIAS_2.15V
SCL
SDA
VDD_MAIN_KEY_3.3V
C319
ONKEY_N
C330