Toshiba SD-K220U Service Manual page 91

NO PLAYBACK PICTURE
OF AV JACK
Is there a oltage
(beam current) at
TP40 and TP42?
No
Is there a signal at pin
9,10,11,and 12 of
IC2601?
No
Is there a signal at pin
9,10,11,and 12 of
IC2601?
No
Is there video signal at
pin 159 of IC4001?
No
Change IC4001.
TROUBLESHOOTING GUIDE
Yes
Yes
Yes
Yes
Check loader block.
and peripheral circuit.
E-30
Check CP2601
Check IC2601
and peripheral circuit.
Check IC8005
and peripheral circuit.