LG GD350, Service Manual

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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
4. TROUBLE SHOOTING
ͽ͸Ͷ͑ͺΟΥΖΣΟΒΝ͑ΆΤΖ͑΀ΟΝΪ
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4. TROUBLE SHOOTING
TEST POINT
CIRCUIT
Figure 4.2.4
CONTROL LOGIC
VLOGIC
TX EN
BS1
BS2
EGSM Rx
VLOGIC
Tx_EN
BS1
BS2
.
. .
.
.
TP1
TP4
TP5
TP2
TP3
1 1 3 L
I N D
0.
5p
C
30
7
4p C
30
9
p 0 2
8 2 3 C
18
n
L3
08
u 7 . 4
0 3 3 C
u 7 . 4
1 3 3 C
n 0 0 1
6 0 3 L
0 0 3 C
n 1
1 0 3 C
n 1
2 0 3 C
n 1 p 9 3
9 1 3 C
n 1
0 2 3 C
K 0 1
0 0 3 T P
n 5 1
4 1 3 L
n 9 . 3
3 1 3 L
6.
8p
C
31
2
6.
8p
C
31
1
4p C
31
0
p 2 1
8 0 3 C
I N D
9 2 3 C
9 0 3 R
1
L3
04
3.
3n
p 1
6 0 3 C
n 5 . 1
3 0 3 L
3.
3n
L3
02
p 3 3
4 0 3 C
n 0 1
3 0 3 C
0 1 1 6 0 3 R
0 1 1 5 0 3 R
0 1 1 4 0 3 R
K 1 3 0 3 R
0 1 1 2 0 3 R
2 0 3 T N A 1 0 3 T N A 0 0 3 T N A
K 0 1
4 1 3 R
T A B V
z H M 5 7 , z H M 5 . 2 4 8 1
1 0 3 L F
0 1 3
5 2
6 4
7
8
9
1
1 T U P N I 2 T U P T U O
1 T U P T U O
2 D N G
2 T U P N I 1 D N G
1 D N G _ C 3 D N G _ C
2 D N G _ C 4 D N G _ C
U
30
0
4 3
5 3
6 3
6 1
5 1
4 1
3 1
2 1
1 1
0 1
1 3
2 3
3 3
17
9
18
8
19
7
20
6
21
5
22
4
23
3
24
2
5 2
6 2
7 2
8 2
9 2
0 3
1
1 D N G
T T A B V
N I _ S C P _ S C D
7 1 D N G
N I _ M S G
6 1 D N G
5 1 D N G
VL
O
G
IC
G
N
D
14
VR
A
M
P
G
N
D
13
TX_E
N
G
N
D
12
B
S1
G
N
D
11
B
S2
G
N
D
10
G
N
D
2
G
N
D
9
G
N
D
3
G
N
D
8
G
N
D
4
A
N
T
3 D N G P
2 D N G P
1 D N G P
5 D N G
1 X R
2 X R
3 X R
4 X R
6 D N G
7 D N G
6 D N G P
5 D N G P
4 D N G P
0 0 3 W S
1 G
A
C
2 G
7 2 3 C
p 0 0 1
z H M 5 2 , z H M 5 . 1 8 8
0 0 3 L F
0 1 3
5 2
6 4
7
8
9
1
1 T U P N I 2 T U P T U O
1 T U P T U O
2 D N G
2 T U P N I 1 D N G
1 D N G _ C 3 D N G _ C
2 D N G _ C 4 D N G _ C
P M A R _ X T
C I G O L V
N E _ X T
1 S B
2 S B
T U O _ S C P _ S C D
T U O _ M S G
X 4 3 X R
4 3 X R
2 1 X R
X 2 1 X R
P M E T _ F R