Daewoo DVQ-13H1FCN, Service Manual

Page: 48 / 55

20
TROUBLESHOOTING GUIDE
3-3) NO PICTURE PLAYBACK
Check the waveform of ICY01 #27
NG : GO to the figure
j
OK : GO to the figure k
ICY01
VCR Y/C/AUDIO/HA AMP
LA71076AM
XS01
32KHz
Check
the crystal
Check
the voltage
ICS01
TIMER/
SYSCON
#20#18
XS02
16MHz
#35
#36
#38
#39
#37
#34 RESET
Vcc(5V)
j
#98
#99
Vcc(5V)
Vcc(5V)
Check
the voltage
(5V)
V
id
e
o
E
n
v
e
lo
p
e
REC H
Check
the crystal
#11 #13
Check
CTL signal
#82
#85
If PB RF no signal,
then change the ICY01.
2HEAD DRUM
#87
#21
#54
#56/57
Y Vcc
HA Vcc
CCD Vcc
C Vcc
PB L
VH SW Pulse
#16
#14
#70 #6
Check
the waveform
(30Hz)
Check
waveform
#83/84
#74
#94 #95
CTL(-) CTL(+)
#97
Check
Control pulse
C-ROT pulse
#15
#16 #93
HA SW Pulse
#15 #35
V
id
e
o
O
U
T
TO I501 #42
Check
the waveform
(1Vp-p)
Appendix