Daewoo CN-071, Руководство по обслуживанию

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31
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
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)
#98
#99
Vcc(5V)
Vcc(5V)
Check
the waveform
Check
the voltage
(5V)
REC Y
SCLK
SDATA
Check
the crystal
#16 #17
Check
SCL/SDA signal
IZ01
PREAMP
LA70001
#19 #17 #16
#9 #5
If REC Y/C no signal,
then change the ICY01.
2HEAD DRUM
#58
#56
#39
#11 Y Vcc
SW Vcc
CCD Vcc
C Vcc
#5 #19
C-SYNC
Check
the waveform
#4 #11
REC H
VH SW Pulse
#15 #20 #18
Check
waveform(30Hz)
Check
voltage
Vcc
Check
the voltage
(5V)
#13
Check
waveform
#31 #32 #9 #10
#94 #95
CTL
HEAD
CTL(+)
CTL(-)
Check
the waveform
(30Hz)
REC C
#2 #10
Check
the waveform
If REC no signal,
then change the IZ01.
#99 #97
C-rotary pulse
m
VH SW Pulse