JVC TV-13142 Service Manual page 40

TV-13142
TV-13142W
PLAYBACK PICTURE IS NOISY
(EVEN AFTER CLEANING HEADS)
Is FM signal at TP4001
more than 250mVp-p ?
Yes
Is VIDEO waveform at pin
26 of IC4001 2V, and are
there any noises ?
Yes
Replace IC4001.
NO COLOR DURING SELF
RECORDING AND PLAYBACK
Does VIDEO signal
appear at pins 28 and
32 of IC4001?
Yes
Does CHROMA
signal at TP4001
during recording?
Check IC4001 and peripheral circuit.
40
TROUBLESHOOTING GUIDE
No
No
No
No
Check IC1004, CYLINDER UNIT and
IC4001.
Check CHROMA BLOCK.
Check J701 and VIDEO input
circuit.
Replace IC4001.