Sharp vc-ga56z Service Manual page 44

FLOW CHART NO.19
Picture (luminance) record is impossible (E-E mode is possible).
Is luminance signal (approx. 0.5 NO
Vp-p) input to the pin(19) of IC201?
YES
Is luminance signal (approx. 0.3 NO
Vp-p) input to the pin(42) of IC201?
YES
Is luminance signal (approx. 0.5
NO
Vp-p) input to the pin(26) of IC201?
YES
Is luminance signal (approx. 0.5 Vp-
NO
p) input to the pin(23) of IC201?
YES
Is the luminance signal (approx. 0.5
NO
Vp-p) input and output to the pins(13)
and (14) of IC201, respectively?
YES
SP mode: Is record FM signal (approx. 20 mAp-p) output to the pins(88) and (89) (SP1) and pins(86) and (87) (SP2) of IC201?
EP mode: Is record FM signal (approx. 20 mAp-p) output to the IC201 pins(93) and (94) (EP1) and pins(92) and (91) (EP2) of IC201?
YES
Check or replace the cylinder.
Check between the pins(18) and
(19) of IC201. (Check C206.)
Check between the pins(21) and
(42) of IC201. (Check C208.)
Check between the pins(39) and
(26) of IC201. (Check C212.)
YES
Is luminance signal (approx. 0.5
Vp-p) input to the pin(39) of IC201?
NO
Is voltage 5V applied to the CCD section
power terminal pin(36) of IC201?
YES
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?
Check between the pins(24) and
(23) of IC201. (Check C210.)
Check the pins(13) and (14) of IC201
peripheral circuit. (R201, R202, C203)
FLOW CHART NO.20
Although picture record is possible, color does not appear (E-E mode is possible).
NO
Is voltage 5V applied to the chroma
power terminal pin(61) of IC201?
YES
NO
Is chroma signal (approx. 143
mVp-p/Burst) input into the
pin(46) of IC201?
YES
Is chroma signal (approx. 180
NO
mVp-p/Burst) input into the
pin(58) of IC201?
YES
NO
Is PRE/REC Vcc 5V applied to the pin(90) of IC201?
Check the periphery of pin(61) of
IC201 and YC 5V line.
Check between the pins(60) and
(46) of IC201. (Check C512.)
YES
Check whether the pins(71) and
(73) of IC201 oscillate (3.58 MHz)?
Check between the pins(58) and
(35) of IC201. (Check R505, C512.)
YES
Is chroma signal (approx. 180
NO
mVp-p/Burst) output to the
pin(35) of IC201?