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SGH-i300 Flow Chart of Troubleshooting and Circuit Diagrams
2-2
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1
OUT
2
VDD
R353
U323
4
GND
NC
3
C346
2
A
1
B
3
GND
5
VCC
4
Y
U315
VBAT
C330
R302
R311
BAT33
VBAT
R317
POWER_DET
R318
nPOWER_FAIL
3.0V
6
7
SW DC
2
DEN
5
3
FET
4
GND
HOLE
81
PWR
SENSE
U306
VBAT
R307
Q302
3D
1G
2S
C317
2
5
4
VBAT
C312
U304
3
1
C348C347
C331
VBAT
R306
VBAT BAT33
C314
R308
C313
EN
3
2
GND
1
IN
5
OUT
4
REF_BYP
VBAT
U301
R316
R304
nPWR_SNS
END_PWR
POWER_DET
PDA_PWR_KEEP AUTO_PWR
RTCALARM
nALARM_SNS
3.0V
C308
VCC_CPU
C307
IN
5
OUT
4
REF_BYP
U302
EN
3
2
GND
1
VBAT
C309
SYS_EN