Receiver Trouble - LG GM200 Service Manual

4.10 Receiver Trouble

TEST POINT
CIRCUIT
R 2 0 4 1 0 K R 2 0 5
C 2 0 2 0 1 . u
5 1 . K
C 2 0 5 1 8 0
C 2 0 4 0 1 . u R 2 0 7 1 0 K
V B A T B P F
V B A T
F c 1 : 5 9 H z F c 1 : 3 . k H z
U 2 0 2 T L V 3 4 2 S R I U G
R 2 0 8
R 2 1 0
O P A M P _ E N 1
1 M
1 9
1 N I + 1 O U T
1 2 3
2 8
G N D N C
R 2 1 1 C 2 1 6 3 7
_ S H D N V +
4 6
1 M 2 N I + 2 O U T
1 u
5 4
C 2 2 3
Q 2 0 1
K R X 1 0 2 E
R 2 1 2 C 2 2 6
4 7 . n
R 2 1 3 0 0 . 1 5 u R 2 1 4
4 7 K
1 0 K 8 2 0
C 2 2 8
S P K _ S N D _ L
F c 1 : 2 . k H z
C 2 3 2
S P K _ S N D _ R
F c 1 : 2 . k H z
2 I C _ S D A
2 I C _ S C L
R C V _ P
R C V _ N
LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
SPK MODULE
0 0 p
2 V 9 3 _ V E X T
U 2 0 5
N L A S 5 2 2 3 B M N R 2 G
C 2 5 9 1 u
1 1 0
V C C N O 2
R 2 9
V B A T N O 1 C O M 2
3 8
C O M 1 N I 2
4 7
V O C I E _ E N N I 1 N C 2
F c 3 : 4 6 H z C 2 1 7 0 0 . 1 5 u
5 6 C 2 1 9
N C 1 G N D
C 2 1 8
E U S Y 0 3 0 0 1 0 1 0 0 . 1 5 u
1 u
D
D
F c 1 : 2 . 0 7 k H z C 2 2 0 8 2 0 0 p
E
C 2 2 1 0 1 . u
F c T : B D R 2 3 0 1 D
8 2 0 0 p
F c 1 : 2 . 0 7 k H z C 2 2 4
E
C 2 2 7 0 1 . u
F c T : B D R 2 3 1 1 F
B P F
F c 1 : 5 k H z
8 2 0 0 p R 2 1 5
F
R 2 1 6
1 2 K C 2 3 0
C
C 2 3 1
1 2 0 0 p
1 2 K
E
4 7 . u
D
C
F c 1 : 5 k H z
R 2 1 7
8 2 0 0 p
2 V 9 3 _ V E X T
1 2 K
R 2 1 8
C 2 3 6
B P F
1 2 0 0 p
1 2 K
C 2 3 7
1 u
2 V 9 3
W o f o r e
R 2 0 1 8 2 K
R 2 0 2 8 2 K
U 2 0 1
F c 3 : 3 8 H z
C 2 0 1 4 7 n R 2 0 3 1 0 K
C 3
N I - V D D
V B A T
C 2 0 3 4 7 n R 2 0 6 1 0 K
C 2
N I + V O +
B 1
S P K _ E N _ S H U T D O W N V O
C 1
B Y P A S S G N D
R 2 0 9
C 2 0 8 0 0 . 6 8 u T P A 6 2 0 5 A 1 Z Q V R
C 2 1 1
E U S Y 0 3 4 9 0 0 1
1 0 0 K
2 2 0 n
C 2 0 9 0 0 . 6 8 u
F 4
E P +
5 E 4
M N I + E - P
4
M N I -
B 1
L L S +
6 A 1
L N I + L L - S
6
L N I -
T w
E 1
R L S +
5 F 1
R N I + U 2 0 3 R L - S
5
R N I - L M 4 9 2 5 0 R L X
C 6
E U S Y 0 3 6 9 5 0 1 H P L
6 B 6
B Y P A S S H P R
R 2 3 4
2 D 3
2 I C _ V D D G N D _ H P A U I D O _ G N D
2
2 I C _ S D A 0
2 C 5
2 I C _ S C L V O _ L D O
1
G N D _ L S C 2 3 3
A 6
G N D _ C P 2 2 . u
T w
C 2 3 9 C 2 4 0
_ V E X T
2 2 . u 2 2 . u H S O _ L
H S O _ R
R 2 1 9
1 0 K
R e
- 97 -
4. TROUBLE SHOOTING
CN201
L204
L203
V B A T
S P K
A l l n i d u c o t s r a e r C o l s e o t C o n
A 3
L 2 0 1 1 0 0 n H
B 3
C 2 0 6
4 7 p C 2 0 7
A 1
- 1 0 0 p
L 2 0 2 1 0 0 n H
B 2
1 6 0 8 G C 2 T R 1 0 J L F
C 2 1 0
E L C H 0 0 0 1 0 4 5
4 7 p
C 2 1 2 C 2 1 3 V A 2 0 1 V A 2 0 2
1 0 u 4 7 p D 2
P R
D N _ I V A R S I T E R _ 1 0 0 5
F B 2 0 1 1 8 0 0
C 2 2 2
C 2 2 5
e t e r e 1 4 7 p
1 0 0 p
F B 2 0 2 1 8 0 0
C 2 2 9
4 7 p
V A 2 0 3 V A 2 0 4
D 2
P R
D N _ I V A R S I T E R _ 1 0 0 5
F B 2 0 3 1 8 0 0
C 2 3 4
e t e r e 2
C 2 3 5
4 7 p
1 0 0 p
F B 2 0 4 1 8 0 0
C 2 3 8
4 7 p
V A 2 0 5 V A 2 0 6
D 2
P R
D N _ I V A R S I T E R _ 1 0 0 5
L 2 0 3
1 0 0 n H
C 2 4 1
4 7 p C 2 4 2
c e v i r e
1 0 0 p
L 2 0 4
1 0 0 n H
C 2 4 3
4 7 p
V A 2 0 7 V A 2 0 8
S E V Y 0 0 0 5 4 0 2
C I V S 0 5 0 5 5 0 0 F R
LGE Internal Use Only
n e t c r o
0 1 D 2 0 2
S B 6 8 . C
C N 2 0 1
E N B Y 0 0 3 3 2 0 1
A X T 3 1 0 1 6 4
G 1 G 2
1 1 0
2 9
3 8
0 3 D 2 0 4
4 7
S B 6 8 . C
5 6
G 3 G 4
C h a n g e f o r m Z F I o t B o t B
0 ( 8 0 7 1 ) 5
0 5 D 2 0 6
S B 6 8 . C