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5.4 LCD display trouble
Check Points
- LCD assembly status ( LCD FPCB, Connector on FPCB)
- EMI filter soldering
- Connector combination
I D
_ F
0 D
INOUT_A4
INOUT_B4
4
6
I D
_ F
1 D
INOUT_A3
INOUT_B3
3
7
I D
_ F
2 D
INOUT_A2
INOUT_B2
2
8
I D
_ F
3 D
INOUT_A1
INOUT_B1
1
9
F
5 L
3 0
E
R V
1 C
S 4
3 0
I D
_ F
4 D
INOUT_A4
INOUT_B4
4
6
I D
_ F
5 D
INOUT_A3
INOUT_B3
3
7
I D
_ F
6 D
INOUT_A2
INOUT_B2
2
8
I D
_ F
7 D
INOUT_A1
INOUT_B1
1
9
F
5 L
5 0
E
R V
1 C
S 4
3 0
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
VFM_2V9
0 Q
0 3
0 1
R 0
TP501
TP502
TP503
TP504
TP505
TP506
TP507
TP509
0 Q
0 3
0 1
R 0
5 C
8 1
u 1
GB042- 40S- H10- E3000
FL505
FL503
LCD Connector
P
n i
: 2
C L
_ D
S V
N Y
C
I _
P
n i
: 3
M
A
E K
_ R
D I
P
1 n i
: 1
F I
M _
O
D
E
F I (
) 1
P
1 n i
: 8
O
E P
( N
T O
) P
P
1 n i
: 9
F I
M _
O
D
E
F I (
) 0
VFM_2V9
CN502
40
1
39
2
5 R
2 1
D
I N
38
3
C L
_ D
D I
37
4
L M
D E
36
5
M
E L
1 D
35
6
M
E L
2 D
34
7
M
E L
3 D
33
8
M
E L
4 D
32
9
M
E L
5 D
31
10
30
11
29
12
28
13
27
14
D _
F I
R _
S E
T E
26
15
25
16
24
17
I D
_ F
S V
N Y
C
23
18
TP508
22
19
21
20
V
5 A
8 0
V E
C L
4 1
0 S
0 2
0 5
ENBY0036001
- Check the connection LCD FPCB
- Check signal flow via EMI filter
Charge Pump(U500)
- 75 -
5. Trouble shooting
VFM_2V9
5 R
6 1
1
K 0
5 R
7 1
D
I N
5 R
8 1
D
I N
F
5 L
4 0
INOUT_B4
INOUT_A4
D
F I
C _
D
6
4
INOUT_B3
INOUT_A3
D
F I
M _
I A
7
3
D
F I
R _
D
INOUT_B2
INOUT_A2
8
2
_
I D
_ F
W
INOUT_B1
INOUT_A1
9
1
E
R V
1 C
S 4
3 0
0 Q
0 3
0 1
R 0
C L
D
n I
e t
a f r
e c
o M
e d
M
k a
r e
I
1 F
M
k a
r e
D I
H S
A
P R
H
L
G L
T I
L
H
Connector(CN502)
(FL503, FL504, FL505)
FL504
FL504
LGE Internal Use Only
F I
M _
O
D
E
_ N
S C
R
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Troubleshooting
