Sharp DV-RW250H (serv.man5) Service Manual ▷ View online
TROUBLESHOOTING GUIDE
E-15
YES
YES
NO
NO
AT PLAYBACK, THE COLOR DOES
NOT APPEAR
Is there color signal in
video signal at pin 26 of
IC101.
Is there video signal at pin
26 of IC101.
Change X'tal.
Change IC101.
YES
NO
Is there color signal in
video signal at pin 7 of
IC8006 ?
Change IC8006.
YES
NO
Is there color signal in
video signal at pin16,17
of IC3001 ?
Check IC8006
and peripheral circuit.
YES
NO
Is there color signal in
video signal at pin19 of
IC3001 ?
Change IC3001.
Check J8001 pin 5
and peripheral circuit.
TROUBLESHOOTING GUIDE
E-16
YES
NO
PLAYBACK PICTURE IS NOISY
(EVEN AFTER CLEANING HEADS)
Is noisy a wave of video
signal at pin 26 of IC101?
Check CYLINDER.
YES
NO
Is noisy a wave of video
signal at pin 7 of IC8006 ?
Change IC8006.
YES
NO
Is noisy a wave of video
signal at pin 16, 17 of
IC3001 ?
Check IC8006
and peripheral circuit.
YES
NO
Is noisy a wave of video
signal at pin 19 of IC3001 ?
Change IC3001.
Check J8001
and peripheral circuit.
TROUBLESHOOTING GUIDE
E-17
YES
YES
NO
NO
NO COLOR DURING SELF
RECORDING AND PLAYBACK
Is there CHROMA signal at
pin 15, 17, 21 of IC101.
Check TU301, J8001,
circuit around it.
Is there CHROMA signal at
pin 26 of IC101.
Refer to "AT PLAYBACK, THE
COLOR DOES NOT APPEAR".
Change IC101.
TROUBLESHOOTING GUIDE
E-18
YES
YES
YES
NO
NO
NO
AT PLAY, AUDIO DOES NOT
APPEAR
At E-E, does audio appear?
Refer to section
"AT E-E NO SOUND".
Is the voltage at pin 96 of
IC101 about 2.5V ?
Check A/C HEAD.
Change IC101 and check
peripheral circuit of pin 6 of
IC101.
Is there audio signal at pin
6 of IC101?
Check whether there are not a
damage, dirt in AUDIO HEAD and
peripheral circuit of pin 24, 27 of
IC701.
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