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Flow Chart of Troubleshooting
9-18
R409
R410
3
IN+
IN-
4
VDD
6
5
VO1
VO2
8
1
_SHUTDOWN
U400
2
BYPAS S
GND
7
G
N
D
9
C419
R412
C411
D
4
0
1
VBAT_AUDIO_3.8V
D
4
0
0
R408
R405
C417
C414
C420
R414
C416
C421
C412
C423
C422
C408
C415
5
GND
7
2 IN
NC
3
NO1
1
NO2
4
6
VCC
U401
8
COM1
COM2
C418
C410
C409
SPK400
R407
L401
R406
R413
L400
C413
R411
VBAT_AUDIO_3.8V
SPK_P
SPK_N
RCV_N
SPK_N
RCV_P
SPK_P
AUDIO_SW
SPK_P
SPK_N
AMP_EN
RCV_P
RCV_N
B
A
T
20
0
C
21
6
C
30
0
C301
C
30
4
C
30
5
C
30
6
C308
C
4
08
C
4
09
C410
C411
C412
C413
C
41
4
C415
C
41
6
C417
C418
C
41
9
C420
C421
C600
C601
C602
C604
C
60
5
C606
C611
C
61
2
C
61
3
D300
D600
L2
00
L201
R
20
4
R
20
5
R
20
8
R
20
9
R213
R214
R
30
0
R
30
1
R302
R304
R305
R405
R406
R
40
7
R
40
8
R409
R
41
0
R411
R
41
2
R
41
3
R
41
4
R
60
0
R601
R
60
2
R604
R
60
7
T
A
30
0
TP205
T
R
30
0
U301
U400
U401
U600
U
60
2
V
60
0
C
30
2
C
30
3
C
3
07
C
30
9
C
42
2
C
42
3
C
5
00
C506
C507
C508
C509
C
5
10
C603
C
60
7
C608
C609
C610
D400
D401
IF
C
50
0
L4
0
0
L4
0
1
L500
L501
R
30
3
R
5
00
R505
R506
R508
R509
R510
R511
R512
R513
R514
R515
R
5
16
R603
TA500
U300
U500
V500
V501
V502
V503
V504
V505
V
50
6
V507