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Flow Chart of Troubleshooting
9-25
Typical 3.7V
VBAT_C_3.8V
C316
C318
R335
LED300
LED301
R311
5
VOUT
U300
3
EN
GND
2
NC
4
1
VIN
LED305
LED303
VDD_KEY_ON
KEY LED
0
0
2
T
A
B
C111
C112
C113
C114
C115
8
1
1
C
3
2
1
C
C124
C125
7
2
1
C
C132
5
1
2
C
6
1
2
C
7
1
2
C
8
1
2
C
0
2
2
C
C311
C316
C317
8
1
3
C
C320
6
2
3
C
7
2
3
C
2
3
3
C
C333
4
3
3
C
0
0
2
L
R107
9
0
1
R
0
1
1
R
R112
1
2
1
R
R122
3
2
1
R
R130
3
0
2
R
5
0
2
R
3
2
3
R
SIM300
TP205
TP
20
9
TP
21
2
TP221
2
2
2
P
T
U101
U102
0
0
3
U
TR300
U303
ZD302