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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
LGE Internal Use Only
4.12 Microphone Trouble
TEST POINT
CIRCUIT
R222
TP1
L207,L208
MIC 201
Mic bias :2.5V
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o
n
e
J
8
1
8
0
8
0
(
C
I
M
w
e
N
o
t
d
e
g
n
a
h
C
C
I
M
u
0
1
5
4
2
C
6
0
2
L
H
n
0
0
1
2
0
4
5
0
0
0
Y
V
E
S
R
F
0
0
5
5
0
5
0
S
V
C
I
0
1
2
A
V
9
0
0
5
0
0
0
H
C
L
E
H
n
0
0
1
8
0
2
L
J
0
1
R
5
0
0
1
K
H
0
1
6
0
1
0
0
Y
M
U
S
B
Q
-
H
5
R
L
0
1
4
0
M
P
S
1
0
2
C
I
M
1
G
2
3
2
G
4
3
G
4
G
6
1
T
U
O
R
W
P
5
p
9
3
6
5
2
C
C
I
M
V
_
5
V
2
9
0
2
A
V
5
5
2
C
p
7
2
0
0
2
2
5
2
2
R
6
4
2
C
p
0
0
1
2
2
2
R
K
1
7
0
2
L
H
n
0
0
1
p
7
2
9
4
2
C
N
_
C
I
M
P
_
C
I
M
TP1