Circuit Diagram - LG KF750 Service Manual

7. CIRCUIT DIAGRAM

1 1 2 2 3 3
A A
T X _ D C S P C S
A N T S W 0
C 1 0 4
2 2 p
A N T S W 1
B B
A N T S W 2
C 1 0 5 C 1 0 6
2 2 p 2 2 p
V A P C
C C
T X _ E G S M
D D
R 1 0 1
T X _ E G S M
1 8
E E
L 1 0 6
R 1 0 6
T X _ D C S P C S
2 7 . n H 2 4
C 1 3 0 C 1 3 1
F F 3 3 . p 2 7 . p
G G
H H
1 1 2 2 3 3
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Only for training and service purposes
4 4 5 5
V
C 1 0 0 C 1 0 1 C 1 0 2 C 1 0 3
2 2 p 1 0 n 1 0 u 1 0 u
G N D 6 P G N D
1 5 2 9
G N D 7
1 6
G N D 8 G N D 5
1 7 1 4
G N D 9 G N D 4
1 8 1 3
G N D 1 0 G N D 3
1 9 1 2
G N D 1 1 G N D 2
2 0 1 1
G N D 1 2 G N D 1
2 2 9
G N D 1 3
2 4
W C D M A 1 W R F _ B A N D _ 1
1 0
D C S _ P C S _ N I R X 1 R X 8 5 0
2 1 7
R X 2 R X 9 0 0
6
G S M _ N I R X 3 R X 1 9 0 0
2 3 5
R X 4 R X 1 8 0 0
4
V A P C
2 5
R S V D
3
V B A T T M O D E
2 6 2
T X E N
1
B S 2 C 1 0 7 2 2 p
2 7
B S 1 A N T
2 8 8
S K Y 7 7 5 1 9 U 1 0 0
D I N
C 1 0 8
S W 1 0 0
K M S 5 - 1 8
C 1 1 2 2 2 p
R X 1 8 0 0
C 1 1 3 2
C 1 1 5
2 2 p
L 1 0 0
1 0 n H
F L 1 0 0 S A F E B 1 G 8 4 F A 0 F 0 0
F L 1 0 1 S A F E B 1 G
L 1 0 2 5 6 . n H
L 1 0 5 5 6 . n H
C 1 2 2 C 1 2 3
5 6 . p 5 6 . p
C 1 2 5 C 1
5 6 . p 5 6 .
1 3 0
G N D A 5 G N D A 6
2 2 9
V A P C A M M O D R X 9 0 0 N
3 2 8
G N D A 7 R X 9 0 0 P
4 2 7
U 1 0 2
T X H B G N D A 8
5 2 6
G N D A 9 R X 8 0 0 P
6 2 5
R F 3 0 0 0 _ O M 6 1 9 1 H N
R F _ C T R L _ S T R B S T R R X 8 0 0 N
7 2 4
D A T A V C C A
8 2 3
R F _ C T R L _ D A T A C L K G N D A 1 0
9 2 2
T E S T O U T D A T A C
1 0 2 1
T E S T O U T M C K I R E Q D A T A S T R
T P 1 0 0
M C L K R E Q
R F _ C T R L _ C L K X 1 0 0
4 3
R 1 1 2
1 2
2 6 M H z 1 0 0 K
K S X 2 - 3 2 - 6 0 0 0 K F A Q - A 0 R
W C L K
R 1 1 3
1 0 0 K
M C L K
1 0 0 K
R 1 1 4
4 4 5 5
6 6 7 7 8 8
B A T
2 p C 1 1 4 2 2 p
R X 1 9 0 0
L 1 0 1
1 0 n H
9 6 F A 0 F 0 0
C 1 1 9 2 2 p C 1 2 0 2 2 p
R X 9 0 0
C 1 2 1 1 2 p
L 1 0 3 4 5 L 1 0 4
1 8 n H F L 1 0 2 1 0 n H
O 2 G 2
N I
O 1 G 1 1 S A F E B 9 4 2 M F L 0 F 0 0
C 1 2 4 1 2 p
3 2
2 6
p
C 1 2 7 5 6 p C 1 2 8 2
C 1 2 9 1 0 p
O 2 G 2
4 5
L 1 0 7 L 1 0 8
F L 1 0 3
1 8 n H N A
N I
1 S A F E B 8 8 1 M F M 0 F 0 0
C 1 3 2 1 0 p
3 2
O 1 G 1
A M P _ L S B _ F R E Q _ L S B
D C L K _ D A T S T R
T P 1 0 1 T P 1 0 2
V R A D
Q D A T A _ A M P _ M S B 2 7 p C 1 3 4
C 1 3 3 1 0 u
D I A T A _ F R E Q _ M S B
V I D G R A D _ 1 V 8
2 7 p
C 1 3 5
6 6 7 7 8 8
- 191 -
9 9 1 1 0 0 1 1 1 1
S H E I L D C A N
S C 1 0 0
1 7
2 8
3 9
4 1 0
5 1 1
6 1 2
S W 1 0 1
2 0 3 6 9 0 - 0 1 E
G 1
L 8 0 2
1 n H G 2
A N T G 3
D I N
C 1 1 1
V D D K _ 2 V 7 5
U 1 0 1 S N 7 4 L V C 1 G 1 2 5 D R L R
1 5
B T _ C L K R E Q _ n _ O E V C C
2
M C L K A
4
3
G N D Y
C 1 1 7 C 1 1 8
0 1 . u 4 7 . u
R 1 0 2
B T _ C L K
3 3
7 p
R X 8 5 0
A D O U T
A _ 2 V 8
9 9 1 1 0 0 1 1 1 1
LGE Internal Use Only
1 1 2 2
A A
B B
C C
D D
E E
F F
R T E M P
G G
H H
1 1 2 2