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TROUBLESHOOTING GUIDE
3-8) NO EXTERNAL VIDEO / AUDIO
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)
#98
#99
Vcc(5V)
Vcc(5V)
Check
the waveform
Check
the voltage
(5V)
SCLK
SDATA
Check
the crystal
#16 #17
Check
SCL/SDA signal
#27
AUDIO OUT
#39
#75A Vcc
SW Vcc
#12 #11
#72#71
MDATA
MCLK
Check
MCL/MDA signal
#36
I501
CHROMA
DCT814B
#78
#42
#2
CVS OUT
#81
JP01
EXT INPUT
Check
the waveform
AUDIO IN
CVS
IN
Check
the voltage
(5V)
IF Vcc