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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
5. Trouble shooting
GM310f service manual
Mobile Switch & FEM circuit Diagram
Mobile Switch & FEM circuit Diagram
H
n
8
.
1
1
0
0
1
C
3
2
4
D
N
G
5
D
N
G
4
2
X
T
_
M
S
G
E
_
0
5
8
M
S
G
1
1
2
1
1
X
R
_
0
5
8
M
S
G
3
1
2
X
R
_
0
5
8
M
S
G
9
X
T
_
S
C
P
_
N
C
P
1
X
R
_
N
C
P
6
1
2
X
R
_
N
C
P
7
1
1
X
R
_
S
C
P
8
1
9
1
2
X
R
_
S
C
P
VDD
7
2
2
0
0
9
1
_
A
M
D
C
W
0
0
1
2
_
A
M
D
C
W
0
2
0
5
8
_
A
M
D
C
W
1
2
2
T
N
A
CTRL1
3
CTRL2
4
5
CTRL3
6
CTRL4
1
X
R
_
M
S
G
E
4
1
5
1
2
X
R
_
M
S
G
E
1
1
D
N
G
8
2
D
N
G
0
1
3
D
N
G
1
0
0
1
L
F
7
1
0
5
D
T
N
A
1
G
2
G
1
0
0
1
W
S
1
0
-
E
1
0
0
-
9
7
2
0
2
3
0
0
1
C
p
5
7
.
0
I
N
D
1
1
0
1
C
3
.
3
6
5
0
1
C
1
1
A
2
A 5
1
B
2
6
2
B
4
D
N
G
8
C
C
V
1
Y
7
2
Y
3
G
S
U
2
3
Z
W
7
2
L
N
5
0
0
1
U
F
R
V
_
5
8
V
2
3
C
8
5
0
1
C
4
5
0
1
C
1
C
p
2
1
2
5
0
1
C
I
N
D
H
n
8
1
1
0
0
1
L
u
1
.
0
1
4
0
1
C
FB1003
p
0
0
0
1
0
4
0
1
C
F
R
V
_
5
8
V
2
u
1
3
5
0
1
C
K
1
1
1
0
1
R
K
1
C1047
2
1
0
1
R
K
1
3
1
0
1
R
100p
C1049
100p
C1048
100p
C1046
100p
0
1
0
1
R
K
1
p
2
2
2
0
0
1
C
0
0
0
3
E
-
2
2
H
-
S
2
-
2
0
3
S
R
G
2
0
0
1
W
S
T
N
A
1
G
2
G
F
R
B
L
_
T
U
O
A
P
_
M
S
G
B
H
_
T
U
O
A
P
_
M
S
G
B
L
_
T
U
O
A
P
_
M
S
G
B
H
_
T
U
O
A
P
_
M
S
G
2
L
E
S
_
T
N
A
1
L
E
S
_
T
N
A
4
L
E
S
_
T
N
A
3
L
E
S
_
T
N
A
6
L
E
S
_
T
N
A
5
L
E
S
_
T
N
A
GM310f service manual
1
0
1
0
0
0
1
1
0
0
WCDMA 2100
1
0
0
0
0
0
1
0
1
0
WCDMA 1900
1
1
0
0
0
0
1
0
0
0
WCDMA 900
0
0
0
0
0
0
0
0
1
0
1900 RX
0
0
0
0
0
1
0
0
0
0
1800 RX
0
0
0
1
0
0
0
0
0
0
900 RX
0
0
0
1
0
1
0
1
1
0
850 RX
0
0
0
0
1
0
0
0
0
1
1800/1900 TX
0
0
0
0
1
1
0
0
1
1
850/900 TX
ANT_SEL6
ANT_SEL5
(TP8)
ANT_SEL4
(TP6)
ANT_SEL3
(TP7)
ANT_SEL2
ANT_SEL1
(TP5)
VC4
(TP4)
VC3
(TP3)
VC2
(TP2)
VC1
(TP1)
1
0
1
0
0
0
1
1
0
0
WCDMA 2100
1
0
0
0
0
0
1
0
1
0
WCDMA 1900
1
1
0
0
0
0
1
0
0
0
WCDMA 900
0
0
0
0
0
0
0
0
1
0
1900 RX
0
0
0
0
0
1
0
0
0
0
1800 RX
0
0
0
1
0
0
0
0
0
0
900 RX
0
0
0
1
0
1
0
1
1
0
850 RX
0
0
0
0
1
0
0
0
0
1
1800/1900 TX
0
0
0
0
1
1
0
0
1
1
850/900 TX
ANT_SEL6
ANT_SEL5
(TP8)
ANT_SEL4
(TP6)
ANT_SEL3
(TP7)
ANT_SEL2
ANT_SEL1
(TP5)
VC4
(TP4)
VC3
(TP3)
VC2
(TP2)
VC1
(TP1)
TP9
TP10
TP11
TP1
TP2
TP3
TP4
TP5
TP6
TP7
TP8