LG B2050 Service Manual - Page 81
Microphone Trouble
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4 . TROUBLE SHOOTING 4.12 Microphone Trouble TEST POINT CIRCUIT DIAGRAM 2V5_VMIC R200 1K MIC_P MIC_N C210 39p R207 100 R210 100 R203 2.2K R208 0 C211 0.1u C201 39p C202 10u C209 39p R214 2.2K C213 39p C214 39p CLOSE TO MIC MIC200 1 2 OB4-15L42-C33L VA201 VA200 AVL5M02-200 AVL5M02-200 - 80 -
- 80 -
4 . TROUBLE SHOOTING
4.12 Microphone Trouble
TEST
POINT
CIRCUIT DIAGRAM
C
I
M
O
T
E
S
O
L
C
K
1
0
0
2
R
0
0
1
0
1
2
R
0
8
0
2
R
K
2
.
2
3
0
2
R
3
1
2
C
p
9
3
p
9
3
9
0
2
C
0
0
2
-
2
0
M
5
L
V
A
0
0
2
A
V
p
9
3
1
0
2
C
p
9
3
4
1
2
C
C
I
M
V
_
5
V
2
0
0
2
-
2
0
M
5
L
V
A
1
0
2
A
V
0
1
2
C
p
9
3
0
0
1
7
0
2
R
0
0
2
C
I
M
L
3
3
C
-
2
4
L
5
1
-
4
B
O
1
2
1
1
2
C
u
1
.
0
K
2
.
2
4
1
2
R
u
0
1
2
0
2
C
N
_
C
I
M
P
_
C
I
M