Read Sharp VC-MH85 (serv.man4) Service Manual online
47
VC-MH705HM/LM
VC-MH815HM/LM,MH85HM
VC-MH715HM,MH835HM
Picture (Luminance) record is impossible (E-E mode is possible).
Although picture record is possible, color does not appear in PAL or NTSC mode (E-E mode is possible).
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Is luminance signal (approx. 0.5Vp-p)
input to the pin(19) of IC201?
input to the pin(19) of IC201?
Is luminance signal (approx. 0.3Vp-p)
input to the pin(42) of IC201?
input to the pin(42) of IC201?
Is luminance signal (approx. 0.5Vp-p)
input to the pin(26) of IC201?
input to the pin(26) of IC201?
Is luminance signal (approx. 0.5Vp-p)
output from the pin(39) of IC201?
output from the pin(39) of IC201?
Is luminance signal (approx. 0.5Vp-p)
input to the pin(23) of IC201?
input to the pin(23) of IC201?
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
Is luminance signal (approx. 0.5Vp-p) input
and output to the pins(13) and (14) of
IC201, respectively?
and output to the pins(13) and (14) of
IC201, respectively?
Check between the pins(18) and (19)
of IC201. (Check C206.)
of IC201. (Check C206.)
Check between the pins(21) and (42)
of IC201. (Check C208.)
of IC201. (Check C208.)
Check between the pins(60) and (46)
of IC201. (Check C512.)
of IC201. (Check C512.)
Check between pins(58) and (35) of
IC201. (Check C515.)
IC201. (Check C515.)
Check between the pins(39) and (26)
of IC201. (Check C212.)
of IC201. (Check C212.)
Check between the pins(24) and (23)
of IC201. (Check C210.)
of IC201. (Check C210.)
Is voltage 5V applied to the CCD section power
terminal pin(36) of IC201?
terminal pin(36) of IC201?
Is CCD control voltage
(approx. 0V<PAL/MESECAM mode>,
(approx. 0V<PAL/MESECAM mode>,
5.0V<NTSC mode>
applied normally to the pin(37) from the
pin(57) of IC201?
Is clock signal
(approx. 8.86 MHz<PAL mode>,
pin(57) of IC201?
Is clock signal
(approx. 8.86 MHz<PAL mode>,
7.16 MHz<NTSC mode>
/0.5Vp-p) for CCD applied normally to the
pin(44) from the pin(69) of IC201?
pin(44) from the pin(69) of IC201?
Check the pins(13) and (14) of IC201
peripheral circuit. (Check R201, R202,
C203)
peripheral circuit. (Check R201, R202,
C203)
SP mode: Is there record FM signal (approx. 20mVp-p) output to the pins(88), (89) (SP1) and pins(86), (87) (SP2) of IC201?
Check or replace the cylinder.
Is PRE/REC Vcc 5V applied to pin(90) of IC201?
Is voltage 5V applied to the chroma section
power terminal at pin(61) of IC201?
power terminal at pin(61) of IC201?
Is chroma signal (approx. 143mVp-p/
burst) input into the pin(46) of IC201?
burst) input into the pin(46) of IC201?
Is chroma signal (approx. 180mVp-p/
burst) input in the pin(58) of IC201?
burst) input in the pin(58) of IC201?
Check peripheral of pin(61) of IC201
and PC 5V line.
and PC 5V line.
<For NTSC mode.>
Check whether the pins(73) and (71) of
IC201 oscillate 3.58MHz?
Check whether the pins(73) and (71) of
IC201 oscillate 3.58MHz?
<For PAL/MESECAM mode.>
Check whether the pins(73) and (75) of
IC201 oscillate 4.43MHz?
Check whether the pins(73) and (75) of
IC201 oscillate 4.43MHz?
Is chroma signal (approx. 180mVp-p/
burst) output to the pin(35) of IC201?
burst) output to the pin(35) of IC201?
FLOW CHART NO.20 RECORDING MODE TROUBLESHOOTING
YES
<For NTSC mode.>
Check peripheral parts of X501.
Check peripheral parts of X501.
<For PAL/MESECAM mode.>
Check peripheral parts of X502.
Check peripheral parts of X502.
Click on the first or last page to see other VC-MH85 (serv.man4) service manuals if exist.