LG LH-CX640 Series Service Manual page 46

3-39
3-40
5.
A/V CIRCUIT
DIAGRAM
1
4
5
2
7
813
11
12
2
3 9
10
6
2
14
A B C D
E
F G H I
J
K L M N
O P Q
R
ST
PB SECAM COLOR
REC AUDIO PB Y+C
PBY
PBC
REC Y+C
REC Y
REC C
REC SECAM COLOR
PB
AUDIO(MONO)
WAVEFORM
Audio
Tracking
is
failed.
IC301
Pin 84 is defective.
EE,
PB Screen
doesn't appear.
Q305
is
defective.
PB COLOR
Signal
disappear.
IC301 Pin70 is defective.
PB COLOR
Signal
disappear.
X301 is defective.
D301or
IC301
Pin 80
REC is defective.
PB
and Recording
is
failed.
(IC301
doesn't
operate.)
IC301
Pin
69,
68
are defective.
Normal
Audio signal is not recorded.
FL301, Q301,
Q306
are
defective. No mono
Audio Signal
in
PB
MODE.
Q302, Q303,
Q314
are
defective.