Lcd Trouble - LG GM200 Service Manual

4. TROUBLE SHOOTING

4.7 LCD Trouble

TEST POINT
FL302
FL305
CIRCUIT
M L E D
M L E D 1
M L E D 2
F L 3 0 2
M L E D 3
L C D _ V S Y N C
N I O U T _ B 4 N I O U T _ A 4
C S 6 4
L C D _ C S
N I O U T _ B 3 N I O U T _ A 3
R S 7 3
L C D _ R S
N I O U T _ B 2 N I O U T _ A 2
8 2
L C D _ W R
N I O U T _ B 1 N I O U T _ A 1
9 1
L C D _ R D
L _ D A T A 0 0
L _ D A T A 0 1
L _ D A T A 0 2
L _ D A T A 0 3
L _ D A T A 0 4
L _ D A T A 0 5
L C D _ D A T A 0 0 N I O U T _ B 4 N I O U T _ A 4
6 4
L C D _ D A T A 0 1 N I O U T _ B 3 N I O U T _ A 3
7 3
L C D _ D A T A 0 2 N I O U T _ B 2 N I O U T _ A 2
8 2
L C D _ D A T A 0 3 N I O U T _ B 1 N I O U T _ A 1
9 1
F L 3 0 5
S F E Y 0 0 1 0 5 0 1
C I V E 1 0 1 8 4 E 1 5 0 R 1 0 1 F R
F L 3 0 8
L C D _ D A T A 0 4 N I O U T _ B 4 N I O U T _ A 4
6 4
L C D _ D A T A 0 5 N I O U T _ B 3 N I O U T _ A 3
7 3
L C D _ D A T A 0 6 N I O U T _ B 2 N I O U T _ A 2
8 2
L C D _ D A T A 0 7 N I O U T _ B 1 N I O U T _ A 1
LGE Internal Use Only 9 1
LGE Internal Use Only
TP1
CN
L C D _ C o n n e t c r o
2 V 9 3 _ V E X T
C N 3 0 4
G 1 G 2
1 3 4
2 3 3
3 3 2
R 3 1 4
4 3 1
5 3 0 F I M O D E 1
6 2 9 F I M O D E
7 2 8
8 2 7
9 2 6
1 0 2 5
1 1 2 4
1 2 2 3
1 3 2 2
1 4 2 1
1 5 2 0
1 6 1 9
1 7 1 8
G 3 G 4
E N B Y 0 0 3 8 6 0 1
A X T 3 3 4 1 2 4 L G 1
D N _ I I D O D E _ 1 0 0 6
L _ D A T A 0 0 L C D _ D A T A 0 8 N I O U T _ B 4 N I O U T _ A 4
6
L _ D A T A 0 1 L C D _ D A T A 0 9 N I O U T _ B 3 N I O U T _ A 3
7
L _ D A T A 0 2 L C D _ D A T A 1 0 N I O U T _ B 2 N I O U T _ A 2
8
L _ D A T A 0 3 L C D _ D A T A 1 1 N I O U T _ B 1 N I O U T _ A 1
9
F L 3 0 6
S F E Y 0 0 1 0 5 0 1
C I V E 1 0 1 8 4 E 1 5 0 R 1 0 1
F L 3 0 9
L _ D A T A 0 4 L C D _ D A T A 1 2 N I O U T _ B 4 N I O U T _ A 4
6
L _ D A T A 0 5 L C D _ D A T A 1 3 N I O U T _ B 3 N I O U T _ A 3
7
L _ D A T A 0 6 L C D _ D A T A 1 4 N I O U T _ B 2 N I O U T _ A 2
8
L _ D A T A 0 7 L C D _ D A T A 1 5 N I O U T _ B 1 N I O U T _ A 1
9
TP2
R309
U304
FB305
FL309
LCD_CS
LCD_RS
FL306
LCD_WR
FL308
1 0 0 K
L C D _ D I
2
R S T
L C D _ R E S E T
TP1
L _ D A T A 1 5
L _ D A T A 1 4
L _ D A T A 1 3
L _ D A T A 1 2
L _ D A T A 1 1
L _ D A T A 1 0
F B 3 0 5
L _ D A T A 0 9
S F B H 0 0 0 7 1 0 2
L _ D A T A 0 8
L _ D A T A 0 7
B L M 1 5 A G 1 0 0 P N 1
L _ D A T A 0 6
M L E D
L C D _ B L _ C T R L
TP2
C 3 2
C 3 2 2
4 7 p
1 u
L _ D A T A 0 8
4
L _ D A T A 0 9
3
L _ D A T A 1 0
2
L _ D A T A 1 1
1
F R
L _ D A T A 1 2
4
L _ D A T A 1 3
3
L _ D A T A 1 4
2
L _ D A T A 1 5
1
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V B A T
U 3 0 4 A A T 3 1 5 7 T I P T - 1
5 1 0
N I C 1 +
C 3 1 0
C 3 0 9
1 u
9 1 u
C - 1
7
C 2 +
8 C 3 1 1
C P
1 u
6
C - 2
1 1
E N _ S E T
1
D 1
2
D 2
3
D 3
4 1 2
G N D N C
R 3 0 9
3
E U S Y 0 2 3 8 7 0 2
C 3 2 4 C 3 2 5
4 7 p 4 7 p
1 0 0 K
Only for training and service purposes
M L E D 1
M L E D 2
M L E D 3
C 3 2 6
4 7 p