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LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
TEST POINT
CIRCUIT
TP3
TP1
TP6
TP4
TP5
U300
TP2
4.15 Microphone Trouble
CIRCUIT
MICROPHONE PATH SELECTION
0.1uF
C324
C313
1u
2V8_VEXT
C311
1u
C312
1u
NC1
5
7
NC2
2
NO1
10
NO2
1
V+
DG2735DN-T1-E3
U300
COM1
3
COM2
9
GND
6
4
IN1
8
IN2
C319
0.1uF
MM_MICP
MIC_PATH_SEL
MAIN_MICP
MAIN_MICN
VINNORP
VINNORN
10u
C310
EVLC14S02050
VA300
2
G1
G2
3
O
4
P
1
MIC300
SPU0410HR5H-PB
100nH
L300
2V5_VMIC
100nH
L303
39p
C302
L302
100nH
C309
39p
C303
22n
C300
22n
C305
39p
MAIN_MICP
MAIN_MICN
T
P5
T
P4
T
P6
T
P3
T
P2
T
P
1