Read Sharp VC-M321HM (serv.man5) Service Manual online
45
VC-M321HM
VC-M331HM
VC-M331HM
NO
FLOW CHART NO.20 PLAYBACK MODE TROUBLESHOOTING
Playback picture does not appear(E-E mode is possible).
Is there FM signal (approx.
0.4Vp-p) input in the pin(78)
of IC201?
Check line between pins(79)
and (78) of IC201.
NO
YES
NO
YES
NO
Is there luminance signal
(approx. 0.4Vp-p) output in the
pin(79) of IC201?
YES
YES
YES
YES
YES
YES
Is the supply V-H.SW.P.
signal fed to pin(81) of IC201?
NO
NO
NO
Is there luminance signal
(approx. 0.5Vp-p) input in the
pin(23) of IC201?
Check line between circuit of
pins(39) and (26) of IC201.
(C212)
Is CCD control voltage approx.5V applied normally to the pin(37) from pin(57) of IC201?
Is clock signal (approx. 8.86MHz <PAL mode>/0.5Vp-p) for CCD applied normally to the pin (44) from (69)
of IC201?
Is there luminance signal
(approx. 0.5Vp-p) output in
the pin(39) of IC201?
Check peripheral circuit of pins
(13), (14) and (17) of IC201.
S-PICTURE circuit (Q201-6).
NO
Is there luminance signal
(approx. 0.5Vp-p) input in the
pin(19) of IC201?
Check line between pins(18)
and (19) of IC201. (C206)
NO
Is there luminance signal
(approx. 0.3Vp-p) input in
the pin(42) of IC201?
Check line between pins(21)
and (24) of IC201. (C208)
NO
NO
YES
YES
NO
YES
YES
Is voltage of 5V applied to the
chroma power terminal pin(61)
of IC201?
Check peripheral circuit pin
(61) of IC201 and PC 5V line.
NO
Is there chroma signal(approx.
156mVp-p <PAL mode>
/burst) input in the pin(46)
of IC201?
Check line between pin(60)
and pin(46) of IC201. (C512)
NO
Is there chroma signal(approx.
197mVp-p <PAL mode>
/burst) input in the pin(58)
of IC201?
YES
Is there chroma signal(approx.
300mVp-p <PAL mode>
/burst) input in the pin(54) of
IC201?
For PAL/SECAM mode.
Check whether the pins(73)
and (75) of IC201 oscillate
4.43MHzat PAL/SECAM mode.
Check line between circuit of
pins(58) and (35) of IC201.
(R505, C515)
For PAL/SECAM mode.
Check parts around of X501.
YES
NO
Is there chroma signal(approx.
197mVp-p <PAL mode>
/burst) output in the pin(35)
of IC201?
Check line between circuit of
pins(55) and (54) of IC201.
(C514)
YES
Although picture playback is possible, colour does not
appear in PAL mode (E-E mode is possible).
Replace IC201.
Replace IC201.
Check V-H.SW.P. line.
Is voltage 5V applied to the CCD section power terminal at pin(36) of IC201?
Check line between circuit of pins(24) and (23) of IC201. (C210)
Is there luminance signal
(approx. 0.25Vp-p) input
output in the pins(13), (14)
and (17) of IC201?
Is there luminance signal
(approx. 0.5Vp-p) input in the
pin(26) of IC201?
Click on the first or last page to see other VC-M321HM (serv.man5) service manuals if exist.