Service manual

-52-
TROUBLESHOOTING GUIDE
3-6) NO RECORD PICTURE
Check the waveform of ICY01 #40
NG : GO to the figure
2-1 (TV PART)
OK : GO to the figure m
ICY01
VCR Y/C
LA71076AM
XS01
32KHz
Check
the crystal
Check
the voltage
ICS01
TIMER/
SYSCON
#65 #67
XS02
16MHz
#35
#36
#3
8
#39
#37
#34
RESET
Vcc(5V)
#98
#99
Vcc(5V)
Vcc(5V)
Check
the waveform
Check
the voltage
(5V)
C-ROT Pulse
PB L
Check
the crystal
#1
6
#1
7
Check
SCL/SDA signal
If REC Y/C no signal,
then change the ICY01.
2HEAD DRUM
#21
#54
#56/57
#87
HA Vcc
C Vcc
CCD Vcc
Y Vcc
#19
#15 #20#1
8
Check
waveform(30Hz)
#6
1
#6
6
#8
2
#83/84
#9
4
#95
CTL
HEAD
CTL(+)
CTL(-)
Check
the waveform
(30Hz)
#9
9
#97
m
VH SW Pulse
REC H
HA SW Pulse
#85
Check
the crystal
XY01
3.58MHZ
#6
2
Appendix