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TROUBLESHOOTING GUIDE
PLAYBACK PICTURE IS NOISY
(EVEN AFTER CLEANING HEADS)
Is FM signal at pin 15
of IC4001 300mVp-p ?
Check HEAD AMP and
CYLINDER UNIT.
is FM signal at pin s 18
ae
22 of 1C4001 over
No
.
Check pins 18 and 22 of IC4001
100mVp-p and are
and peripheral circuit.
there any noises ?
x
Is VIDEO waveform at pins 29 yo
<< and 30 of IC4001 500mVp-p
Replace IC4001.
and are there any noises ?
Check Q4009.
;
2...
a
Is VIDEO output at the
<_ emitter of Q4202 2Vp-p,
Check IC4001 and Q4202.
<eni are there any noises ?
Replace J4201.
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