Circuit Diagram - LG GM750 Service Manual

7. CIRCUIT DIAGRAM

1 6 1 5
A N T 1 0 6 A N T 1 0 5
A N T 1 0 1
L
R 1 0 3
D I N R 1 0 1
0
C 1 0 3
C 1 0 6 C 1 6 6
D I N C 1 1 5
2 2 . n
3 3 . n
1 0 0 p
R e . v 1 0 . 0 9 0 8 1 2
C 1 1 0 R e . v 1
C 1 1 1
1 8 n
1 p
C 1 6 8
C 1 5 8
K
C 1 4 9
C 1 3 7
A N T _ S E L 3
A N T _ S E L 2
A N T _ S E L 0
A N T _ S E L 1
R 1 1 8
D C S _ P C S _ T X
4 7
D C S 1 ( 7 1 0 1 - 7 8 5 M H ) z
7 d B
J P C S 1 ( 8 5 0 1 - 9 1 0 M H ) z
R 1 0 6
G S M _ T X
7 5
G S M 8 5 0 8 ( 2 4 8 - 4 9 M H ) z
G S M 9 0 0 8 ( 8 0 9 - 1 5 M H ) z 1 1 d B
I
A N T E N N A S W T I C H M O D U L E L O G C I
A N T _ S E L 0 A N T _ S E L 1
G S M 8 5 0 E / G S M T X L O W I H G H
H
P C N P / C S T X I H G H I H G H
W B 8 5 0 9 / 0 0 L O W L O W
W B 1 9 0 0 I H G H L O W
W B 2 1 0 0
I H G H L O W
G S M 8 5 0 R X I H G H L O W
I H G H I H G H
E G S M R X
G L O W I H G H
D C N R X
P C S R X L O W L O W
F
V D D _ R X
L 1 1 7
2 2 . n
E
C 1 1 8 3 3 p
R X _ W C D M A _ 2 1 0 0 _ L N A _ O U T
C 1 6 5
D I N
D
W C D M A R X 2 1
L N A f r o h t e G P
C
F 1 L 0 7
B 9 1 4 6
1 4
O U T N I
G 1 G 2 G 3
2 3 5
L 1 3 0
C 1 9 1 3 3 p
6 8 . n
C 1 8 0
C 1 4 3
B 1 0 0 n
D I N
R e . v 1 0 .
0 9 0 8 1 2
U 1 0 4
A L M 2 - 4 1 2
R 1 1 5 G N D
3
G P S _ L N A _ E N S _ D F L I
6 8 . K 2
S M Z Y 0 0 2 1
A
L G E n I e t n r l a U s e O n y l
1 6 1 5
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Only for training and service purposes
1 4 1 3 1 2 1 1 1 0
S W 1 0 1
K M S 5 - 1 8
C 1 0 8 3 3 p
0 . 0 9 0 8 1 2 L 1 3 3 2 3
F L 1 0 2
1 0 0 n C 1 8 8 1 0 0 p 1 G 1 O 1
S A F E B 8 8 1 M F L 0 F 5 5
N I
G 2 O 2 S F S Y 0 0 3 0 0 0 3
5 4
1 n
L 1 1 9
1 n
D I N
1 n
1 n
S K Y 7 7 5 2 1
2 3
G 1 O 1 F L 1 0 5
7 1 7 C 1 9 8 1 0 0 p 1
N I S A F E B 9 4 2 M F L 0 F 0 0
B S 1 A N T G 2 O 2
6 S F S Y 0 0 2 4 3 0 1
B S 2 5 4
8
_ T X E N L 1 2 0
1
H B _ R F _ N I D I N
3 9
L B _ R F _ N I M O D E
2 0 1
G N D 1 R S V D
1 1
G N D 2
1 2 3 1
U 1 0 7
G N D 3 R X 4
2 1 4 1
G N D 4 R X 3 2 3
F L 1 0 6
2 2 5 1 G 1 O 1
G N D 5 R X 2 C 1 9 9 3 3 p 1 S A F E B 1 G 8 4 F A 0 F 0 0
N I
3 2 6 1 G 2 O 2
G N D 6 R X 1 S F S Y 0 0 2 4 3 0 2
2 4
5 4
G N D 7
5 2 1 8
G N D 8 W C D M A 1 W C D M A _ 2 1 0 0 _ R T X L 1 2 1
6 2 1 9
G N D 9 W C D M A 2 W C D M A _ 9 0 0 _ R T X 8 2 . n
2 7 0 2
G N D 1 0 W C D M A 3 W C D M A _ 1 9 0 0 _ R T X
2 8
G N D 1 1
9 2 4 R 1 0 2 R e . v 1 0 .
G N D 1 2 V A P C G S M _ P A _ R A M P
3 0 5 2 2 . K
G N D 1 3 V B A T T
C 1 3 8
2 3
3 9 p F L 1 0 8
1 G 1 O 1
C 2 0 1 3 3 p S A F E B 1 G 9 6 F A 0 F 0 0
N I
G 2 O 2 S F S Y 0 0 2 4 3 0 3
5 4
L 1 2 2
2 m m 3 3 . n
S ( K Y 7 7 5 2 ) 1
V B A T
1 ( 6 0 ) 8 C 2 0 6 C 1 2 9
A N T _ S E L 2 A N T _ S E L 3 1 0 u 7 4 p W 2 1 0 0 _ D v i r e i s y t
L O W L O W
A N T 1 0 4
L O W L O W
C 2 1 6 0 C 2 1 0 3 3 p 1
R e v C .
I H G H L O W
C 2 0 7
I H G H L O W
D I N
L O W L O W
L O W ( ) X I H G H
L O W ( ) X I H G H
L O W ( ) X I H G H
G S M Q u a d
L O W ( ) X I H G H
W C D M A r T p i e l
C 1 8 4 3 3 p C 1 9 6 3 3 p
W C D M A _ 9 0 0 _ R T X
L 1 3 1 L 1 1 5
C 2 2 9 3 9 . p
W B 2 1 0 0 _ M X I _ N I M 1 0 n
1 8 . n
F L 1 1 3
B 9 4 1 1
1 3
C 1 2 4 3 3 p
N I O U T C 1 7 9 W 2 1 0 0 R X 2 ( 1 1 0 - 2 1 7 0 M H ) z
4
D I N
_ O U T
G 1 G 3
2 5
L 1 1 6
C 1 7 7 3 9 . p
W B 2 1 0 0 _ M X I _ N I P
1 8 . n
0 0 L N A i C c r u t i
C 1 4 8 3 3 p C 1 4 7 8 2 .
W C D M A _ 2 1 0 0 _ R T X
L 1 0 7
1 2 . n
S
A N T 1 0 3 A N T 0 1 2
C 1 9 2 3 3 p
C 1 7 0 C 1 8 7
D I N D I N
C 2 0 4
C 1 0 5 6 8 . p
W C D M A _ 1 9 0 0 _ R T X
1 n
L 1 0 3
2 7 . n
L 1 1 3 R 1 1 3
V R E G _ R F R X _ 1
6 8 . n
1 2
R e v C .
C 1 6 4 C 1 6 3
1 0 p 0 1 . u
V D D
5 C 1 4 4 3 3 p C 1 5 6 3 3 p
_ O U T G P S _ N I
4
7 0 1
C 1 8 9
D I N
1 4 1 3 1 2 1 1 1 0
9 8 7 6
U 1 0 5
2 6
R T R _ T X _ O N R F _ O N
2
T C X O _ R T R _ 1 9 2 . M H Z T C X O
2 0
S S B D T _ R T R S B D T
C 1 2 7 1 8 . p
R X _ G S M _ 8 5 0 _ M
C 1 8 2 1 0 0 p 5 5
G S M _ T X L B _ R F _ O U T 1
7
C 1 6 2 1 0 0 p 5
W C D M A _ 9 0 0 _ T X _ O U T L B _ R F _ O U T 2
L 1 2 6
G S M 8 ( 6 9 8 - 9 4 M H ) z
2 2 n
C 1 6 1 3 3 p 5 6
D C S _ P C S _ T X H B _ R F _ O U T 1
C 2 0 2 3 3 p 5 8
W C D M A _ 1 9 0 0 _ T X _ O U T H B _ R F _ O U T 2
5 9
C 1 2 8 1 8 . p C 2 1 5 3 3 p
R X _ G S M _ 8 5 0 _ P W C D M A _ 2 1 0 0 _ T X _ O U T H B _ R F _ O U T 3
3 0
R X _ W C D M A _ 9 0 0 _ P W P R X B L P
3 1
R X _ W C D M A _ 9 0 0 _ M W P R X L B N
3 2
C 1 7 1 2 2 . p R X _ W C D M A _ 1 9 0 0 _ P W P R X H B P
R X _ G S M _ 9 0 0 _ M 3 3
R X _ W C D M A _ 1 9 0 0 _ M
W P R X H B N
C 1 5 7 2 2 p 4 1
L 1 1 2 W D R X L B
G S M 9 ( 2 5 9 - 6 0 M H ) z
1 8 n
C 1 3 6 2 2 p 4 0
W D R X H B 1
3 9
W 2 1 0 0 _ D v i r e i s y t W D R X H B 2
C 1 5 0 2 2 . p
R X _ G S M _ 9 0 0 _ P
5 0
R X _ G S M _ 8 5 0 _ P G C E L L _ N I P
5 1
R X _ G S M _ 8 5 0 _ M
G C E L L _ N I N
C 1 7 3 4 7 . p 4 8
R X _ D C S _ M R X _ G S M _ 9 0 0 _ P E G S M _ N I P
4 9
R X _ G S M _ 9 0 0 _ M E G S M _ N I N
4 6
L 1 1 0 D C S 1 ( 8 0 5 1 - 8 8 0 M H ) z R X _ D C S _ P D C S _ N I P
4 7 . n 4 7
R X _ D C S _ M D C S _ N I N
4 4
R X _ P C S _ P G P C S _ N I P
C 1 8 3 4 7 . p
R X _ D C S _ P 4 5
R X _ P C S _ M G P C S _ N I N
4 2
G P S _ N I G P S _ N I
C 1 6 0 3 3 p 5 2
P D E T _ N I P D E T _ N I
C 1 9 4 2 7 . p R 1 1 7 1 2 K 6 8
R X _ P C S _ M T X _ R B A I S
1 %
3 8
C 2 0 9 2 2 p
W P R X S E 1
3 6
L 1 0 2 P C S 1 ( 9 3 0 1 - 9 9 0 M H ) z R X _ W C D M A _ 2 1 0 0 W P R X E S 2
4 7 . n
C 1 7 4 2 7 . p
R X _ P C S _ P
R X _ W C D M A _ 2 1 0 0 _ L N A _ O U T
F L 1 1 1
B 9 4 3 3 S F S Y 0 0 3 5 0 0 2
C 2 0 0
4 C 1 4 0 3 3 p
N I O U T W 2 1 0 0 _ D v i r e i s y t
G 1 G 2 G 3 2 7 . n
2 3 5
C 1 8 1
1 8 . p
R e . v 1 0 .
0 9 0 8 1 2
D u p e l x r e D u l a P - A M
G M 7 5 0 : h W C D M A 8 5 ( 0 B a n d ) 5 S D D Y 0 0 0 4 7 0 1 S M P Y 0 0 1 8
G M 7 5 : 0 W C D M A 9 0 ( 0 B a n d ) 8 S D M Y 0 0 0 1 6 0 1 S M P Y 0 0 1 8
W 8 5 0 T X 8 ( 2 4 - 8 4 9 M H ) z
W 9 0 0 T X 8 ( 8 0 - 9 1 5 M H ) z
F L 1 1 0
B 7 6 8 1
C 2 1 7 C 1 8 6
C 2 1 1 3 3 p
A N T T X
3 3 p 3 3 . n
C 1 9 3 2 7 . p
R X 1 R X _ W C D M A _ 9 0 0 _ P
C 2 3 2
R X 2 1 2 . p
G N D 1
L 1 1 4 L 1 0 5
G N D 2 G N D 5
D I N 6 8 . n
G N D 3 G N D 4
S D M Y 0 0 0 1 6 0 1
C 1 3 0 2 7 . p
R X _ W C D M A _ 9 0 0 _ M R e v C . 0 6 0 3
B a n d V I I I
R 1 1 9
P D E T _ N I
R F O u : t
4 7
R 1 2 0 R 1 2 1 D C B o l c k n i g C a . p r o
1 5 0 1 5 0 n o s h u t n L
L e n t g
C 1 7 8 C 1 9 0
1 2 . n
3 3 p
L 1 1 8
1 p
F L 1 0 4
W 2 1 0 0 T X 1 ( 9 2 0 1 - 9 8 0 M H ) z
S A Y F P 1 G 9 5 A A 0 B 0 0
6 1
p
A N T R X
R e v C .
3 C 1 3 4 3 3 p
T X
2 9
G N D 1 G N D 6
4 8 C 1 1 4 3 3 p C 1 0 9 3 3 p
G N D 2 G N D 5 R X _ W C D M A _ 2 1 0 0
5 7
G N D 3 G N D 4
L 1 0 9
S D M Y 0 0 0 1 9 0 1
1 8 . n
B a n d I
R 1 1 6
5 1
1 m m
+ V P W R
1 ( 6 0 ) 8
R E V B . C E R A M C I
F L 1 1 2
W 1 9 0 0 T X 1 ( 8 5 0 - 1 9 1 0 M H ) z
A C M D 7 - 4 0 7
6 1
A N T R X
C 2 2 2 C 2 0 5 C 2 2 1
3
T X
3 3 p 3 3 p 2 2 . p
2 9
G N D 1 G N D 6
4 8
C 1 6 9 L 1 3 5 C 2 3 0 L 1 2 4 L 1 0 6
G N D 2 G N D 5
5 7 3 3 . n D I N
G N D 3 G N D 4 R X _ W C D M A _ 1 9 0 0 _ P
1 2 . n
1 2 . p 1 0 0 p
S D P Y 0 0 0 4 7 0 1
L 1 2 5
B a n d I I
5 6 . n
C 1 0 1 L 1 0 1
2 2 . p D I N
L 1 3 2 L 1 3 4 C 2 3 1
R X _ W C D M A _ 1 9 0 0 _ M
1 2 . n
5 6 . n 1 0 0 p
C 2 0 8
1 2 . p
D C B o l c k
B a U l n i C c r u t i
9 8 7 6
- 185 -
5 4 3 2 1
L G E n I e t n r l a U s e O n y l
R T R 6 2 8 5
6 4
T X _ P I R T R _ T X P I
6 3
T X _ N I
6 6
T X _ Q P C 2 1 3
6 5
T X _ Q N
6 8 p
5 R T R _ T I X M
C 1 7 2 1 0 n
V T U N E 1
2 4 C 1 5 9 1 0 n
R T R _ T X Q P
V T U N E 2
9 C 1 6 7 1 n
V T U N _ E G P S
C 2 1 2
1 1
P R X Q _ P R T R _ R X Q P
1 2 6 8 p
R T R _ R X Q M
P R X _ Q N
1 4
P R X _ P I R T R _ R X P I R T R _ T X Q M
1 3
P R X _ N I R T R _ R I X M
1 5
D R X _ Q P R T R _ D R X Q P
1 6
D R X _ Q N R T R _ D R X Q M
1 7
D R X _ P I R T R _ D R X P I
1 8
D R X _ N I R T R _ D R I X M
1 9
N C
6 7
D A C _ R I E F R T R _ D A C _ R E F
3
V D D A 1 _ 1 V R E G _ R F R X _ 1
4 R 1 0 9 2 2 .
V D D A 1 _ 2 + 2 7 . V
6
R 1 1 4 1 0
V D D A 1 _ 3
1 0
V D D A 1 _ 4
2 2
V D D A 1 _ 5
5 3
V D D A 1 _ 6
V D D A 1 : P n i 3 4 , 6 , 1 , 0 2 , 2 5 , 3 = + 2 7 . V V D C
1
V D D A 2 _ 1
7
V D D A 2 _ 2 0 6 0 3
V D D A 2 : P n i 1 7 , 8 , 2 , 1 2 , 5 2 , 7 3 , 7 4 , 3 5 , 4 6 , 0 6 , 1 6 , 2 = + 2 1 . V V D C R 1 1 1 0
8 V D D _ R X
V D D A 2 _ 3
2 1
R 1 0 8 5 1 .
V D D A 2 _ 4 V R F _ S M P S
2 5 R 1 1 0 5 1 .
V D D A 2 _ 5
+ 2 1 . V
2 7
V D D A 2 _ 6
3 7
V D D A 2 _ 7
4 3
V D D A 2 _ 8
5 4
V D D A 2 _ 9
6 0
V D D A 2 _ 1 0
6 1
V D D A 2 _ 1 1
6 2
V D D A 2 _ 1 2
V R E G _ M S M P _ 2 6 . V
C 1 1 9 C 1 2 2 C 1 2 6
2 2 p 1 2 0 p 0 1 . u
T X S A W
4 0 1 S F S Y 0 0 3 6 5 0 1
8 0 1 S F S Y 0 0 3 7 6 0 1
1 m m
+ V P W R
W 9 0 0
C 2 2 6 C 1 1 7 C 1 0 7
1 ( 6 0 ) 8
1 0 0 p 2 2 u F L 1 0 3
1 n
B 9 4 4 2 S F S Y 0 0 3 7 6 0 1
E C T H 0 0 0 1 9 0 3 L 1 2 7 L 1 0 4
4 1
R e . v 1 0 . O U T N I W C D M A _ 9 0 0 _ T X _ O
D o n t o u s e a c e a r m c i C a . p G 3 G 2 G 1
U 1 0 1 2 7 . n 3 3 . n
5 3 2
A W T 6 2 2 4 R
W C D M A _ 9 0 0 _ O N L 1 1 1
B a n d 8 C 1 2 3
C 1 9 5 1 0 0 p D I N D I N
1 5
P G N D
4 1 1
G N D 3 V E N _ 9 0 0 C 1 1 6
1 3 2
R F O U T _ 9 0 0 R F N I _ 9 0 0
1 2 3
3 3 p
V C C V M O D E 1
1 1 4
V C C A V B A T T
: h 2 0 m m 0 1 5
G N D 2 N C _ V M O D E 2 C 1 8 5
9 6
G N D 1 R F N I I _ M T
8 7
3 3 p
R F O U T I _ M T V E N I _ M T R e . v 1 0 .
F L 1 0 9
S F S Y 0 0 3 5 1 0 1
B 9 4 1 4
L 1 0 8
S M P Y 0 0 1 8 8 0 1 C 1 3 5
4 1
W C D M A _ P A _ R 0 O U T N I W C D M A _ 2 1 0 0 _ T X _ O
2 7 . n
G 3 G 2 G 1
3 3 p
W C D M A _ 2 1 0 0 _ O N
5 3 2
C 2 0 3 C 1 2 5
D I N 3 9 . n
R e . v 1 0 .
W 2 1 0 0
C 1 0 4 C 1 7 6 C 2 1 8
1 0 u 1 0 0 p
U 1 0 2 2 2 0 p W 1 9 0 0
A W T 6 2 7 8 R
1 1 F L 1 0 1
P G N D
B 9 6 4 0 S F S Y 0 0 3 6 6 0 1
1 0 1 L 1 2 3
V C C V B A T T C 2 2 7 C 2 2 4
9 2 4 1
G N D 3 R F N I O U T N I W C D M A _ 1 9 0 0 _ T X _ O U T
8 3 2 2 . n G 3 G 2 G 1
R F O U T V M O D E 2 3 3 p
3 3 p R e v C .
7 4 5 3 2
G N D 2 V M O D E 1 W C D M A _ P A _ R 0
6 5 L 1 2 9
G N D 1 V E N A B L E W C D M A _ 1 9 0 0 _ O N L 1 2 8
4 7 . n
D I N
R e v C .
5 4 3 2 1
L
K
J
I
H
G
F
U T E
D
U T
C
B
A
LGE Internal Use Only