Read Sharp VC-M522HM (serv.man8) Service Manual online
45
VC-M522HM
VC-MH722HM
VC-MH732HM
VC-MH722HM
VC-MH732HM
FLOW CHART NO.20 PLAYBACK MODE TROUBLESHOOTING
Playback picture does not appear. (E-E mode is possible.)
Is there FM signal inputted at pin(78) of
IC201?
YES
NO
Is there luminance signal input output at pins
(13),(14) and (17) of IC201?
YES
NO
Is there luminance signal inputted at pin(19)
of IC201?
YES
NO
Is there luminance signal inputted at pin(42)
of IC201?
YES
NO
Is there luminance signal inputted at pin(26)
of IC201?
YES
YES
Is there luminance signal outputted at pin(39)
of IC201?
YES
NO
Check line between pins(79) and (78) of IC201.
Check peripheral circuit of pins(13), (14) and
(17) of IC201.
Check line between pins(18) and (19) of IC201.
(C206)
Is there luminance signal outputted at pin(79)
of IC201?
YES
Is the supply V-H.SW.P. signal fed to pin(81)
of IC201?
YES
Check V-H.SW.P. line.
YES
Althouth picture playback is possible, colour does not appear.(E-E mode is possible).
Is voltage of 5V applied to the chroma power
terminal pin(61) of IC201?
YES
YES
NO
Is there chroma signal inputted at pin(46) of
IC201?
YES
NO
Is there chroma signal inputted at pin(58) of
IC201?
Is there chroma signal outputted at pin(55) of
IC201?
YES
YES
Is there chroma signal inputted at pin(54) of
IC201?
Check line between circuit of pins(55) and
(54) of IC201.
NO
NO
Check peripheral circuit pin(61) of IC201 and
PC 5V line.
Check line between pin(60) and pin(46) of
IC201.(C512)
YES
Is CCD control voltate approx. 5V applied normally to the pin(37) from pin(57) of IC201?
Is clock signal (approx. 8.86MHz/0.5Vp-p) for CCD applied normally to the pin(44) from (69) of IC 201?
Check whether the pins(73) and (75) of IC201
oscillate 4.43MHz.
Check parts around of X501.
Is there chroma signal outputted at pin(35)
and IC201?
NO
Check line between circuit of pins (58) and
(35) of IC201.
YES
YES
Check line between pins(21) and (24) of IC201.
(C208)
Check line between circuit of pins(39) and (26)
of IC201.(C212)
Is there luminance signal inputted at pin(23)
of IC201?
YES
NO
Is there luminance signal outputted at pin(52)
of IC201?
NO
Check line between circuit of pins(24) and (23)
of IC201.(C210)
Replace IC201.
Is voltage 5V applied to the CCD section power terminal at pin(36) of IC201?
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