Key Backlight Trouble - LG GM200 Service Manual
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- User manual (48 pages) ,
- User manual (74 pages) ,
- User manual (66 pages)
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4.14 key backlight Trouble
TEST POINT
R127
R128
R125
R126
CIRCUIT
K
E
Y
_
B
A
C
K
I L
G
H
T
2
D
1
0
7
D
N
_ I
I D
O
D
E
_
1
0
0
6
LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
V
B
A
T
- 107 -
R122,R120
R119
R120
V
B
A
T
C
N
1
1
G
N
D
2
K
E
Y
_
R
O
W
0
3
K
E
Y
_
R
O
W
1
4
K
E
Y
_
R
O
W
2
5
K
E
Y
_
R
O
W
3
6
K
E
Y
_
R
O
W
4
7
K
E
Y
_
R
O
W
5
8
9
1
0
E
N
B
A
X
K
4. TROUBLE SHOOTING
0
3
2
0
1
9
K
E
Y
_
C
O
L
0
1
8
K
E
Y
_
C
O
L
1
1
7
K
E
Y
_
C
O
L
2
1
6
K
E
Y
_
C
O
L
3
1
5
K
E
Y
_
C
O
L
4
1
4
P
O
W
E
R
K
E
Y
1
3
1
2
K
E
Y
_
B
A
C
K
I L
1
1
K
E
Y
_
B
A
C
K
I L
Y
0
0
2
0
1
0
1
8
2
0
1
4
5
W
G
D
1
0
8
E
D
T
Y
0
0
0
8
6
0
6
LGE Internal Use Only
G
H
T
3
G
H
T
2
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