LG B2050, Service Manual

Page: 75 / 133

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4 . TROUBLE SHOOTING
4.9 Earphone Trouble
TEST POINT
CIRCUIT DIAGRAM
) 8 0 6 1 (
H u 7 . 4
K C A J T E S D A E H O T E S O L C
K C A J T E S D A E H
8 0 6 1
) 8 0 6 1 (
p 9 3
0 0 2 C
7 1 2 C
p 9 3
7 . 4 5 1 2 R
u 0 1 2 1 2 C
H u 2 . 2 1 0 2 L
1 T 5 2 Q 3 6 5 P C N 0 0 2 U
1
D N G
4
C N
3
T U O V n i V
2
T X E V _ 8 V 2
M 1
6 1 2 R
2 0 2 L
H n 0 7 2
K C A J _ 5 V 2
K 0 2
6 0 2 R
7 . 4 1 1 2 R
K C A J _ 5 V 2
7 . 4 2 1 2 R
p 9 3
6 1 2 C
0 3 1 2 R
u 0 1
8 0 2 C
u 3 3
6 0 2 C
p 9 3
T X E V _ 8 V 2
8 1 2 C
M 1
2 0 2 R
K 0 2 2
9 0 2 R
AVL5M02-200
4 0 2 A V
u 1 . 0 3 0 2 C
A N
4 0 2 C
AVL5M02-200
2 0 2 A V
p 9 3
5 0 2 C
T X E V _ 8 V 2
u 0 1 5 1 2 C
+ N I V
- N I V 4
H u 2 . 2 0 0 2 L
1 0 2 U
T - K X E 5 7 0 9 X A M
2
D N G
1
T U O
C C V
5
3
3 0 2 A V
AVL5M02-200
9 1 2 C
p 0 1
7 0 2 C
u 0 1
K 2 . 2
1 0 2 R
4 0 2 R
K 3 . 3
K 0 2 5 0 2 R
0 0 2 J
T N A _ O I D A R
T C E T E D _ K C A J
P _ C I M _ T E S D A E H
N _ T U O _ K P S _ T E S D A E H
P _ T U O _ K P S _ T E S D A E H
T C E T E D _ K O O H
N _ C I M _ T E S D A E H
A N
2 3 2 R
T X E V _ 8 V 2
7 2 2 C
u 0 1
7
1 O N
2
2 O N
0 1
+ V
1
5 0 2 U
2 R M 4 8 6 4 S A L N
3
1 M O C
9
2 M O C
6
D N G
1 N I
4
2 N I
8
5
1 C N
2 C N
A N
4 3 2 R
N _ K P S _ T E S D A E H
P _ K P S _ T E S D A E H
P _ T U O _ K P S _ T E S D A E H
N _ T U O _ K P S _ T E S D A E H R _ K P S _ O I D A R
L _ K P S _ O I D A R
L E S _ O I D A R
J200
U205
U200
U201