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LGE Internal Use Only
Copyright © 011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
CIRCUIT
VA504
VDD_IO_1V8
R504
10
R503
100K
J501
EAG62831701
6
1
4
4D
5
M5-MIC
M4-DETECT
M4-L
M1-R
M6-GND
VA505
VA503
1800
FB504
1800
FB502
C502
27p
VA501
VA502
C501
1n
1800
FB503
120
L502
L501
100n
10
5
Q
2
3
1
G
D
S
6.8n
C506
1M
R501
DNI
R505
10
FB501
120
L503
1800
FB507
C507
6.8n
FM_ANT
HS_OUT_R
HS_OUT_L
HS_GND
HS_GND
HS_JACK_DET
HS_MIC
TP04
VAUD_HS_BIAS
390p
C522
VA512
VA513
VDD_IO_1V8
C518
22n
R514
100K
1K
R511
C519
39pF
10u
C521
R512
47
C524
120p
R508
1.5K
C520
22n
C523
390p
R509
2.2K
R513
220K
1M
R510
U501
2
3
1
4
5
VCC
VIN-
OUT
VIN+
GND
HS_MIC_N
GND
HS_MIC_P
HS_GND
HS_MIC
HS_HOOK_DET
In case of absence of HOOK must be removed
TP03
Headset MIC
Resoldering points