Sharp vc-ga56z Service Manual page 45

FLOW CHART NO.21
Playback picture does not appear (E-E mode is possible).
Is FM signal (approx. 0.4 Vp-p) NO
input to the pin(78) of IC201?
YES
Is the luminance signal (approx. 0.25
NO
Vp-p) input and output to the pins(13),
(14) and (16) of IC201, respectively?
YES
NO
Is luminance signal (approx. 0.5 Vp-
p) input to the pin(19) of IC201?
YES
NO
Is luminance signal (approx. 0.5
Vp-p) input to the pin(42) of IC201?
YES
NO
Is luminance signal (approx. 0.5
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
Replace IC201.
Check between the pins(79) and
(78) of IC201.
YES
Is luminance signal (approx. 0.4
Vp-p) input to the pin(79) of IC201?
NO
Is V-H.SW.P. applied to the
pin(81) of IC201?
NO
Check V-H.SW.P. line.
Check the periphery of pins(13),
(14) and (16) of IC201. (Check
C203, R201-2, L201, C205, R203.)
Check between the pin(18) and
pin(19) of IC201. (Check C206.)
Check between the pin(21) and
pin(42) of IC201. (Check C208.)
Check between the pin(39) and
pin(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?
Is control voltage approx. 5V applied normally to the pin(37) from the pin(57) of IC201? Is CCD clock signal
(approx. 7.16 MHz/0.5 Vp-p) applied to the pin(44) from the pin(69) of IC201?
Check between the pins(24) and (23) of IC201. (Check C210.)
FLOW CHART NO.22
Although picture is played back, 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. 403
mVp-p/Burst) input into the
pin(46) of IC201?
YES
Is chroma signal (approx. 508
NO
mVp-p/Burst) input into the
pin(58) of IC201?
YES
YES
Is chroma signal (approx. 286
mVp-p/Burst) input into the
pin(54) of IC201?
NO
Check between the pin(55) and
pin(54) of IC201. (Check C514.)
Replace IC201.
YES
Check the periphery of pin(61) of
IC201 and YC 5V line.
Check between the pin(60) and
pin(46) of IC201. (Check C512.)
YES
Check whether the pin(71) and pin(73)
of IC201 oscillate (3.58 MHz)?
Check between the pin(58) and pin(35)
of IC201. (Check R505, C515.)
YES
Is chroma signal (approx. 508
mVp-p/Burst) output to the
pin(35) of IC201?
NO