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
#34
RESET
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
#11
Y 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
Summary of Contents for CN-071
Page 7: ...6 BLOCK DIAGRAM...
Page 8: ...7 BLOCK DIAGRAM PH01...
Page 15: ...14 IC DESCRIPTION IC501 DCT814B LA76814B IC VIDEO PROCESSOR...
Page 16: ...15 IC DESCRIPTION ICY01 LA71550M IC VCR Y C AUDIO PROCESSOR...
Page 45: ...44 EXPLODED VIEW 1 DVQ 19H2FC...
Page 46: ...45 EXPLODED VIEW 2 DVQ 19H1FC...
Page 47: ...46 EXPLODED VIEW 3 DVQ 13H2FC...
Page 48: ...47 EXPLODED VIEW 4 DVQ 13H1FC...
