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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
5. TROUBLE SHOOTING
5.7 Microphone trouble
Check Points
-Microphone hole
-Mic. Bias & signal line
CN301
C312 C319 C318
MIC100
C317
C309
1u
VBAT
C312
100n
39P
C311
R300
680
680
R301
680
R302
R303
680
R304
680
C319
100n
47
R305
R306
680
680
R307
R308
680
2V62_VIO
R309
680
C317
27P
C318
2.2U
L300
100NH
R311
47
GB042-30P-H10-E3000
CN302
16
15
17
14
18
13
19
12
20
11
21
10
22
9
23
8
24
7
25
6
26
5
27
4
28
3
29
2
30
1
R312
680
680
R313
MAIN_MIC_P
MAIN_MIC_N
VMIC_P
FLIP
KEY_ROW5
KEY_COL3
KEY_COL0
KEY_ROW3
KEY_ROW2
KEY_ROW4
KEY_ROW1
KEY_COL1
KEY_COL2
KEY_ROW0
KEY_COL4
UART_TX
UART_RX
VMIC_N
END_KEY
KEY_BACKLIGHT
RPWRON
MIC100
SUMY0010610
SPM0410LR5H-QB
6
5
4
3
2
1
OUT
G1
G2
G3
PWR
G4
R
F
0
5
1
V
1
0
1
5
0
5
0
L
V
CI
2
0
1
A
V
R
F
0
5
1
V
1
0
1
5
0
5
0
L
V
CI
3
0
1
A
V
R102
DNI
VMIC_N
VMIC_P
MAIN_MIC_P
MAIN_MIC_N
Содержание AR140B
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