Read Sharp VC-S2000 (serv.man2) Service Manual online
45
VC-S2000HM
FLOW CHART NO.20 PLAYBACK MODE TROUBLESHOOTING
Playback picture does not appear. (E-E mode is possible.)
Is there FM signal (approx.0.3Vp-p)
inputted at pin(5) of IC501?
NO
YES
Is there luminance signal (approx.0.5
Vp-p) inputted at pin(19) of IC201?
YES
NO
Is there luminance signal (approx.0.3
Vp-p) inputted at pin(42) of IC201?
YES
NO
Is there luminance signal (approx.0.5
Vp-p) inputted at pin(26) of IC201?
YES
YES
Is there luminance signal
(approx.0.5Vp-p) outputted at
pin(39) of IC201?
YES
NO
Check line between pins(79)
of IC201 and pin(5) of IC501.
Although picture playback is possible, colour does not appear in
PAL mode.(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 (approx.156
mVp-p/burst) inputted at pin(46) of
IC201?
YES
NO
Is there chroma signal (approx.197
mVp-p) inputted at pin(58) of
IC201?
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 at PAL/SECAM mode.
Check parts around of X501.
Is there chroma signal(approx.
197mVp-p/burst) outputted at
pin(35) and IC201?
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 voltage 5V applied to the CCD section power terminal at pin(36) of IC201?
Is there chroma signal outputted at
pin(55) of IC201?
Is there FM signal (approx.0.3Vp-p)
inputted at pin(78) of IC201?
NO
YES
Check the voltage of pin(4) of
IC501 on playback mode.
LOW
HIGH
Check line between pin(4) of
IC501 and pin(97) of IC701.
Replace IC501.
Is there luminance signal (approx.
0.25Vp-p) inputted at pin(14) of IC201?
Is there luminance signal (approx.0.5
Vp-p) inputted at pin(5) of IC2001?
Is there luminance signal (approx.0.4
Vp-p) inputted at pin(1) of IC2002?
NO
YES
Check peripheral circuit of
pins(13) and (14) of IC201.
NO
YES
Check line between pin(18)
of IC201 and pin(5) of IC2001.
Check line between pin(3) of
IC2001 and pin(1) of IC2002.
Check line between pin(56)
of IC2001 and pin(19) of IC201.
Is there luminance signal (approx.0.4
Vp-p) inputted at pin(1) of IC2001?
Check peripheral circuit of
IC2002.
NO
YES
NO
YES
YES
Is there chroma signal inputted at
pin(9) of IC2006?
YES
Replace IC201.
YES
NO
Check line between pins (55)
of IC201 and pin(9) of IC2601.
Check line between pins (11)
of IC2006 and pin(87) of
IC2401.
Check line between pins (75) of
IC2401 and pin(33) of IC2001.
Check line between pins (26) of
IC2401 and pin(4) of IC2503.
YES
Is there chroma signal inputted at
pin(87) of IC2401?
NO
YES
Is there chroma signal inputted at
pin(33) of IC2401?
NO
YES
Is there chroma signal inputted at
pin(4) of IC2503 and base of
Q2502?
NO
YES
Is there chroma signal outputted
at S terminal and pin(15) of LINE1
SCART socket?
NO
Check peripheral circuit of
IC2503 and Q2502.
YES
Replace C512.
Replace X501.
NO
NO
See FLOR CHART NO.18 E-E MODE TROUBLESHOOTING.
Is there luminance signal (approx.0.5
Vp-p) inputted at pin(23) of IC201?
YES
NO
Is there luminance signal (approx.2.2
Vp-p) outputted at pin(52) of IC201?
YES
NO
Check line between circuit of
pins(24) and (23) of IC201.
(C210)
Replace IC201.
Is there luminance signal inputted at
pin(54) of IC2001?
YES
NO
Check line between pin(52) of
IC201 and pin(54) of IC2001.
Is there luminance signal inputted at
pin(82) of IC2401?
Check line between pin(39) of
IC2001 and pin(82) of IC2401.
Is there luminance signal inputted at
pin(37) of IC2001?
Check line between pin(73) of
IC2401 and pin(37) of IC2001.
Is there luminance signal outputted at
pin(21) of IC2001?
Check peripheral circuit of
IC2001.
YES
NO
YES
NO
YES
NO
NO
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