Daewoo DVQ-13H1FC Service Manual page 31

TROUBLESHOOTING GUIDE
3-5) NO SOUND PLAYBACK
Check
the voltage
Check
SCL/SDA signal
#16 #17
SW Vcc #39
A Vcc #75
Check
the voltage
(5V)
AUDIO HEAD
RESET #34
Vcc(5V) #37
Vcc(5V) #98
Vcc(5V) #99
#65 #67
#26
SDATA
SCLK
A.MUTE
#95
ICY01
#81
VCR Y/C
LA71550M
#86 #90 #88
AUTO
CCU12
BIAS
QCU02
Invert PB H
from ICS01#20
REC H,PB L
ICS01
TIMER/
SYSCON
#71
Check
the voltage
H : QUE/REV/STILL
L : NORMAL PLAY
AUDIO OUT
#51
Check
the waveform
If no signal,
then change the ICY01.
See the 2-2) TV NO
SOUND
30
Check
the crystal
#39
XS02
16MHz
#38
Check
the crystal
#35
XCS01
32KHz
#36
#72
Check
MCL/MDA signal
MDATA
MCLK
#12 #11
I501
CHROMA
DCT814B
#1
SOUND
AMP