Aiwa VX-G143K Service Manual page 42

PLAYBACK PICTURE IS NOISY
(EVEN AFTER CLEANING HEADS)
Is FM signal at TP4002
more than 200mVp-p?
Yes
Is VIDEO waveform at pin
52 of IC4001 1Vp-p and
are there any noise?
Yes
Is there FM signal at pin 79
of IC4001 200mVp-p?
Yes
Is there CHROMA signal
at pin 55 of IC4001
200mVp-p?
Yes
Replace IC4001.
TROUBLESHOOTING GUIDE
No
No
No
No
E-10
Replace CYLINDER UNIT.
Check pin 52 of IC4001 and
peripheral circuit.
Check pins 79 and 78 and
peripheral circuit.
Replace IC4001.