Only For Training And Service Purposes - LG GM750 Service Manual

4. TROUBLE SHOOTING
A N T 1 0 6 A N T 1 0 5
A N T 1 0 1
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
C 1 1 1
1 8
1 p
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
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
LGE Internal Use Only
S W 1 0 1
K M S 5 - 1 8
TP1
C 1 0 8 3 3 p
L 1 3 3
1 0 R e . v 1 0 . 0 9 0 8 1 2
1 0 0 n
n
C 1 6 8 1 n
C 1 5 8 1 n
C 1 4 9 1 n
C 1 3 7 1 n
S K Y 7 7 5 2 1
7 1 7
B S 1 A N T
6
B S 2
8
_ T X E N
1
H B _ R F _ N I
3 9
L B _ R F _ N I M O D E
2 1 0
G N D 1 R S V D
1 1
G N D 2
1 2 1 3
U 1 0 7
G N D 3 R X 4
2 1 1 4
G N D 4 R X 3
2 2 1 5
G N D 5 R X 2
2 3 1 6
G N D 6 R X 1
2 4
G N D 7
2 5 1 8
G N D 8 W C D M A 1
2 6 1 9
G N D 9 W C D M A 2
2 7 2 0
G N D 1 0 W C D M A 3
2 8
G N D 1 1
2 9 4
G N D 1 2 V A P C
3 0 5
G N D 1 3 V B A T T
2 m m
V B A T
C 2 0 6 C 2 1
1 ( 6 0 ) 8
1 0 u 4 7 p
Schematic of GSM/DCS/PCS Rx Block
1.TROUBLE SHOOTING
TP2
C 1 8 8 1 0 0 p 1
L 1 1 9
D I N
C 1 9 8 1 0 0 p 1
L 1 2 0
D I N
1
C 1 9 9 3 3 p
L 1 2 1
W C D M A _ 2 1 0 0 _ R T X
W C D M A _ 9 0 0 _ R T X 8 2 . n
W C D M A _ 1 9 0 0 _ R T X
R 1 0 2 R e . v 1 0 .
G S M _ P A _ R A M P
2 2 . K
C 1 3 8
3 9 p
1
C 2 0 1 3 3 p
L 1 2 2
3 3 . n
9
W 2
A N T 1 0 4
C 2 1 6
Check FEM Block
Refer 1.4
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C 1 2 7 1 8 . p
2 3
F L 1 0 2
G 1 O 1 L 1 2 6
G S M
S A F E B 8 8 1 M F L 0 F 5 5
N I
2 2 n
G 2 O 2 S F S Y 0 0 3 0 0 0 3
5 4
C 1 2 8 1 8 . p
C 1 7 1 2 2 . p
2 3
F L 1 0 5
G 1 O 1 L 1 1 2
G S M
S A F E B 9 4 2 M F L 0 F 0 0
N I
1 8 n
G 2 O 2 S F S Y 0 0 2 4 3 0 1
5 4
C 1 5 0 2 2 . p
C 1 7 3 4 7 . p
2 3
F L 1 0 6
G 1 O 1
L 1 1 0 D C S 1 (
S A F E B 1 G 8 4 F A 0 F 0 0
N I
4 7 . n
G 2 O 2
S F S Y 0 0 2 4 3 0 2
5 4
C 1 8 3 4 7 . p
R
C 1 9 4 2 7 . p
R
2 3
F L 1 0 8
G 1 O 1 L 1 0 2
P C S 1 (
S A F E B 1 G 9 6 F A 0 F 0 0
N I
4 7 . n
G 2 O 2
S F S Y 0 0 2 4 3 0 3
5 4
C 1 7 4 2 7 . p
R
1 0 0 _ D v i r e i s y t
F L 1 1 1
S F S Y 0 0 3 5 0 0 2
B 9 4 3 3
C 2 0 0
1 4
0 C 2 1 0 3 3 p C 1 4 0 3 3 p
N I O U T
G 1 G 2 G 3
2 7 . n
R e v C .
2 3 5
C 2 0 7 C 1 8 1
D I N 1 8 . p
R e . v 1 0 .
0 9 0 8 1 2

Only for training and service purposes

R X _ G S M _ 8 5 0 _ M
8 ( 6 9 8 - 9 4 M H ) z
R X _ G S M _ 8 5 0 _ P
R X _ G S M _ 9 0 0 _ M
9 ( 2 5 9 - 6 0 M H ) z
R X _ G S M _ 9 0 0 _ P
R X _ D C S _ M
8 0 5 1 - 8 8 0 M H ) z
X _ D C S _ P
X _ P C S _ M
9 3 0 1 - 9 9 0 M H ) z
X _ P C S _ P
W 2 1 0 0 _ D v i r e i s y t