JVC HR-XVC20US Service Manual page 41

AT PLAYBACK AND RECORDING,
CYLINDER MOTOR UNLOAD
Is the voltage at pin 8 of
CP3001 about DC12.6V?
YES
In playback,is at pin 12 of
CP3001 about DC2.6V?
YES
Check the DECK BLOCK.
PLAYBACK PICTURE IS NOISY
(EVEN AFTER CLEANING HEADS)
Is noisy a wave of video
signal at pin 26 of IC101?
YES
Is noisy a wave of video signal
of EMITTER of Q8004
NO
Check J8001.
TROUBLESHOOTING GUIDE
NO
NO
NO
YES
Check IC502.
Check IC3001.
Check CYLINDER.
Check Q8004.
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