Read Sharp VC-M321HM (serv.man5) Service Manual online
44
VC-M321HM
VC-M331HM
VC-M331HM
NO
NO
YES
FLOW CHART NO.19 RECORDING MODE (E-E operational) TROUBLESHOOTING
Picture(Luminance) record is impossible
(E-E mode is possible).
Is there luminance signal
(approx. 0.5Vp-p) input in the
pin (19) of IC201?
Check line between pins(18)
and (19) of IC201.
YES
NO
Is there luminance signal
(approx. 0.3Vp-p) input in the
pin (42) of IC201?
Check line between pins(21)
and (42) of IC201. (C208)
NO
YES
YES
YES
YES
Is there luminance signal
(approx. 0.5Vp-p) input in the
pin (26) of IC201?
Check line between pins(39)
and (26) of IC201. (C212)
NO
Is there luminance signal
(approx. 0.5Vp-p) input in the
pin (23) of IC201?
Check line between pins(24)
and (23) of IC201. (C210)
NO
Is there luminance signal
(approx. 0.5Vp-p) input and
output in the pins(13) and (14)
of IC201, respectively?
Check peripheral circuit of
pins (13) and (14) of IC201.
(R201, R202, C203)
Is there luminance signal
(approx. 0.5Vp-p) input in the
pin (39) of IC201?
Is voltage 5V applied to the
CCD section power terminal at
pin(36) of IC201?
YES
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?
NO
NO
YES
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.
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
NO
Is there chroma signal (approx.
197mVp-p <PAL mode>
/burst) input in the pin(58) of
IC201?
For PAL/SECAM mode. Check
whether the pins(73) and (75)
of IC201 oscillate 4.43MHz at
PAL/SECAM mode.
Check line between pins(58)
and (35) of IC201. (R505, C515)
Is there chroma signal (approx.
197mVp-p <PAL mode>
/burst) output in the pin(35) of
IC201?
YES
YES
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?
YES
Is voltage 5V applied to the
CCD section power terminal at
pin(36) of IC201?
NO
Although picture record is possible, colour does
not appear in PAL mode (E-E mode is possible).
YES
Replace IC201.
YES
Check or replace the cylinder.
NO
Is the supply voltage of 5V
(PRE/REC Vcc) fed to pin(90)
of IC201?
SP mode : Is there record FM signal (approx. 20mVp-p) output in the pins
(88), (89) <SP1> and pins(86), (87) <SP2> of IC201?
EP mode : Is there record FM signal (approx. 20mVp-p) output in the pins
(93), (94) <EP1> and pins(92), (91) <EP2> of IC201?
SP mode : Is there chroma ingredient included signal (approx. 20mVp-p) output in the pins(88), (89) <SP1>
and pins(86), (87) <SP2> of IC201?
EP mode : Is there chroma ingredient included signal (approx. 20mVp-p) output in the pins(93), (94) <EP1>
and pins(92), (91) <EP2> of IC201?
NO
For PAL/SECAM mode.
Check parts around of X501.
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