Microphone Trouble - LG GD310 Service Manual

5.7 Microphone trouble

Check Points
-Microphone hole
-Mic. Bias & signal line
C317
C312 C319 C318
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2V62_VIO
1
2
RPWRON
R305 47 3
UART_TX
R311 47 4
UART_RX
5
FLIP
6
KEY_BACKLIGHT
7
8
9
R306 680 10
KEY_COL0
R308 680 11
KEY_COL1
R313 680 12
KEY_COL2
R312 680 13
KEY_COL3
R307 680 14
KEY_COL4
15
GB042-30P-H10-E3000
VMIC_P
VMIC_N
MAIN_MIC_N
MAIN_MIC_P
CN301
MIC100
C312 100n
C319 100n
L300
100NH
C318 C317
2.2U
VBAT
CN302
30
29
28
27
26
25
24
23 R301 680
22 R309 680
21 R304 680
20 R303 680
19 R302 680
18 R300 680
17
16
C309 C311
1u 39P
MIC100
G4
6
PWR
5
G3
4
G2
3
G1
2
OUT
1
SUMY0010610
SPM0410LR5H-QB
R102
DNI
- 79 -
5. TROUBLE SHOOTING
MAIN_MIC_P
MAIN_MIC_N
VMIC_P
27P
VMIC_N
END_KEY
KEY_ROW0
KEY_ROW1
KEY_ROW2
KEY_ROW3
KEY_ROW4
KEY_ROW5
LGE Internal Use Only