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27
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
LA71550M
XCS01
32KHz
Check
the crystal
Check
the voltage
ICS01
TIMER/
SYSCON
#65 #67
XS02
16MHz
#35
#36
#38
#39
#37
#34RESET
Vcc(5V)
j
#98
#99
Vcc(5V)
Vcc(5V)
Check
the waveform
Check
the voltage
(5V)
Video Envelope
PB RF
SCLK
SDATA
Check
the crystal
#16 #17
Check
SCL/SDA signal
IZ01
PREAMP
LA70001
#19 #17 #16
#7#1
If PB RF no signal,
then change the IZ01.
2HEAD DRUM
#58
#56
#39
#11Y Vcc
SW Vcc
CCD Vcc
C Vcc
#5#19
C-SYNC
Check
the waveform
#4 #11 #6
#6
REC H
VH SW Pulse
#13
QV SYNC
#14
#20#18
Check
the waveform
(30Hz)
Check
voltage
Vcc
Check
the voltage
(5V)
#13
Check
waveform
#4 #6 #9 #10