LG KF750 Service Manual page 111

4. TROUBLE SHOOTING
S p e a k r e A m . p
A C C _ G P 1 3 _ S P K _ A M P _ E N
C 5 3 1 4 7 n
S P K R P
C 5 3 2 4 7 n
S P K R N
C _ I R E S
S Y S C L
C _ I P C
C _ I H S Y
C _ I V S Y
A C C _ G P 2 1 _ V C I _ O _ O
A P P _ 2 I C _ S
A P P _ 2 I C _ S D A
O N S W A
K E Y O U
K E Y O U
K E Y N I
K E Y N I
L C D _ D A T [ A
L C D _ D A T [ A
L C D _ D A T [ A
L C D _ D A T [ A
L C D _ D A T [ A
L C D _ D A T [ A
L C D _ D A T [ A
L C D _ D A T [ A
A P P _ G P 1 2 _ L C D _
V D D E _ 1
T o u c h S c e r e n 2 I C i w h t G I P O
T O U C H _ S C R E E N _ S C
T O U C H _ S C R E E N _ S D A
T O U C H _ S C R E E N _ N I
T O U C H _ B U T T O N _ S
T o u c h B t u o t n 2 I C i w h t G I P O # 2
T O U C H _ B U T T O N _ S D A
LGE Internal Use Only
R 5 1 7 1 % 3 9 K
B Y P A S S G N D
C 1
_ S H U T D O W N V O -
B 1
R 5 2 0 1 % 1 0 K
0 6 0 3
N I + V O +
C 2
R 5 2 1 1 % 1 0 K
0 6 0 3
N I - V D D
C 3
U 5 0 0 T P A 6 2 0 5 A 1 Z Q V
0 6 0 3
R 5 2 4 1 % 3 9 K
_ n
R 7 0 0 0
K 0
R 7 0 1 0
L K
N C
N C
F F
C L
_ n
T 1
T 2
4
5
] 0
] 1
] 2
] 3
] 4
] 5
] 6
] 7
D I
V 8
# 1
L
T
C L
C 7 1 2 C 7 1 3 C 7 1 4 C 7 1 5
D I N D I N D I N D I N
TP26_BB
1
R518, R519
V B A T
C 5 2 5
2 2 . u
R 5 1 8 1 %
B E A R P
B 2
R 5 1 9 1 %
B E A R N
A 1
B 3
A 3
R
A C C _ G P 2 7 _ A M P _ S W _ E N
C N 7 0 2
1 8 0
2 7 9
3 7 8
4 7 7
5 7 6
6 7 5
7 7 4
8 7 3
9 7 2
1 0 7 1
1 1 7 0
1 2 6 9
1 3 6 8
1 4 6 7
1 5 6 6
1 6 6 5
1 7 6 4
1 8 6 3
1 9 6 2
2 0 6 1
2 1 6 0
2 2 5 9
2 3 5 8
2 4 5 7
2 5 5 6
2 6 5 5
2 7 5 4
2 8 5 3
2 9 5 2
3 0 5 1
3 1 5 0
3 2 4 9
3 3 4 8
3 4 4 7
3 5 4 6
3 6 4 5
3 7 4 4
3 8 4 3
3 9 4 2
4 0 4 1
Copyright © 2008 LG Electronics. Inc. All right reserved.
- 112 -
U 5 0 1 F S A 2 2 6 8 T U M X
1 5 1 0 8
1 B 0 1 A
1 7
1 B 1 S 1
1 5
2 5
2 B 0 2 A
V B A T
3 6
2 B 1 S 2
4 9
G N D V C C
0 6 0 3
TP27_BB
S B A I S
2
Pin 65, 66
S E N S
G A N I 1
G A N I 2
C _ I D 0
C _ I D 1
C _ I D 2
C _ I D 3
C _ I D 4
C _ I D 5
C _ I D 6
C _ I D 7
S P K _ R C V +
S P K _ R C - V
M O T O R _ P W R -
M O T O R _ P W R +
L C D _ R D _ N
L C D _ V S Y N C
L C D _ R E S E T _ N
L C D _ W E _ N
L C D _ C S _ N
L C D _ A D S _ N
L C D _ P W M
W L E D 5
W L E D 4
W L E D 3
W L E D 2
W L E D 1
W L E D _ P W R
P S - E L 2 I C i w h t G I P O # 2
T O U C H _ R S T
Only for training and service purposes
S P K _ R C V +
S P K _ R C - V
C 5 3 5
1 0 n
0 6 0 3