Read Sharp DV-NC70H (serv.man5) Service Manual online
56
DV-NC65H/S
DV-NC70H
DV-NC70H
FLOW CHART NO.20
NO
YES
YES
NO
YES
YES
NO
YES
YES
YES
NO
NO
YES
YES
NO
YES
NO
YES
NO
YES
YES
NO
NO
NO
Is luminance signal (approx. 0.5 Vp-p)
inputted to the pin(19) of IC201?
Is luminance signal (approx. 0.3 Vp-p)
inputted to the pin(42) of IC201?
Is luminance signal (approx. 0.5 Vp-p)
inputted to the pin(26) of IC201?
Is luminance signal (approx. 0.5 Vp-p)
inputted to the pin(23) of IC201?
Is luminance signal (approx. 0.5 Vp-p)
inputted and outputted to the pins(13)
and (14) of IC201, respectively?
SP mode: Is record FM signal (approx. 20 mAp-p) outputted to the pins(88) and (89) (SP1) and pins(86) and (87) (SP2) of IC201?
LP/EP mode: Is record FM signal (approx. 20 mAp-p) outputted to the pins(93) and (94) (EP1) and pins(91) and (92) (EP2) of IC20
1?
Check or replace the cylinder.
Check the pins(13) and (14) of
IC201 peripheral circuit.
(Check R201, R202, C203)
Is PRE/REC Vcc 5V applied to the pin(90) of IC201?
Is chroma signal (approx. 180 mVp-p/
Burst) outputted to the pin(35) of
IC201?
Check between the pins(58) and
(35) of IC201. (Check C515.)
Check whether the pins(71) and
(73) of IC201 oscillate (3.58 MHz)?
Check between the pins(60) and
(46) of IC201. (Check C512.)
Is chroma signal (approx. 143 mVp-p/
Burst) inputted into the pin(46) of
IC201?
Is chroma signal (approx. 180 mVp-p/
Burst) inputted into the pin(58) of
IC201?
Check between the pins(21) and
(42) of IC201. (Check C208.)
Check between the pins(26) and
(39) of IC201. (Check C212.)
Is luminance signal (approx. 0.5 Vp-p)
inputted to the pin(39) of IC201?
Is voltage 5V applied to the CCD section
power terminal pin(36) of IC201?
Is CCD control voltage approx. 5V
applied normally to the pin(37)
from the pin(57) of IC201?
Is clock signal (approx. 7.16 MHz/
0.5 Vp-p) for CCD applied normally
to the pin(44) from the pin(69) of
IC201?
Is voltage 5V applied to the chroma
power terminal pin(61) of IC201?
Check the periphery of pin(61) of
IC201 and PC 5V line.
Check between the pins(18) and
(19) of IC201. (Check C206.)
Check between the pins(23) and
(24) of IC201. (Check C210.)
Picture (luminance) record is impossible (E-E mode is possible).
Although picture record is possible, color does not appear (E-E mode is possible).
Click on the first or last page to see other DV-NC70H (serv.man5) service manuals if exist.