TROUBLESHOOTING GUIDE
E-7
PLAYBACK PICTURE IS NOISY
(EVEN AFTER CLEANING HEADS)
No
No
No
Yes
Yes
Is FM signal at pins 72
and 73 of IC4501 ?
Yes
Is FM signal at TP4501
more than 200mVp-p ?
Is VIDEO waveform at
pin 26 of IC4501 and are
there any noises ?
Check HEAD AMP and interchange
adjustments.
Check CP4501 and peripheral circuit.
Replace IC4501.
Check IC601 and peripheral circuit.