Service manual

-49-
TROUBLESHOOTING GUIDE
ICY01
VCR Y/C
LA71076AM
XS01
32KHz
Check
the crystal
Check
the voltage
ICS01
TIMER/
SYSCON
#2
0
#1
8
XS02
16MHz
#3 5
#3
6
#3
8
#3
9
#3
7
#3
4
RESET
Vcc(5V)
k
#9 8
#9 9
Vcc(5V)
Vcc(5V)
Check
the waveform
Check
the voltage
(5V)
VH SW Pulse
REC H
Check
the crystal
#1
1
#1
3
Check
CTL signal
I501
CHROMA
LA76845
#4
2
#3 5
If CVS no signal,
then change the ICY01.
CVS
#2
1
#54
#56/5
7
#8 7
HA Vcc
C Vcc
CCD Vcc
Y Vcc
#12 #1 1
#7
2
#7
1
#5
6
MDATA
MCLK
Check
MCL/MDA signal
#4
0
Caption
CVS
R OUT
G OUT
B OUT
See the 2-1) TV NO
PICTURE
#2
1
#2 0
#1 9
Check
the waveform
C-ROT Pulse
HA SW Pulse
PB L
#15 #1
6
#7
0
#14
#1
5
#1
6
Appendix