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LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. Trouble Shooting
Check key button.
If Key button is pressed or
appearance is abnormal,
Change the key button.
1
Check BtoB connector(CN100)
Re-assemble CN100.
Check connector soldering.
Re-solder CN100.
2
CN100
T
A
B
V
4
2
1
4
2
6
T
X
A
0
0
1
N
C
3
1
2
1
4
1
1
1
5
1
0
1
6
1
9
7
1
8
8
1
7
9
1
6
0
2
5
1
2
4
2
2
3
3
2
2
4
2
1
1
G
2
G
3
G
4
G
8
V
1
_
E
D
D
V
N
_
A
W
S
N
O
5
N
I
Y
E
K
4
T
U
O
Y
E
K
3
T
U
O
Y
E
K
2
T
U
O
Y
E
K
1
T
U
O
Y
E
K
0
T
U
O
Y
E
K
0
N
I
Y
E
K
1
N
I
Y
E
K
2
N
I
Y
E
K
3
N
I
Y
E
K
4
N
I
Y
E
K
E
S
N
E
S
P
I
L
F
_
P
G
_
C
C
A
1
D
E
L
_
N
I
A
M
2
D
E
L
_
N
I
A
M
N
K
P
S
L
P
K
P
S
L
P
1
C
I
M
1
O
C
C
N
1
C
I
M