Sharp 27DV-S100 Service Manual page 66

Video playback failure.
NO
Is there the FM input signal (about
0.4Vp-p) at pin (78) of IC2201?
YES
Are there the luminance input and
output signals (about 0.25Vp-p) at NO
pins (13), (14) and (16) of IC2201
respectively?
YES
NO
Is there the luminance input signal
(about 0.5Vp-p) at pin (19) of IC2201?
YES
NO
Is there the luminance input signal
(about 0.3Vp-p) at pin (42) of IC2201?
YES
NO
Is there the luminance input signal
(about 0.5Vp-p) at pin (26) of IC2201?
YES
Is there the luminance input signal
NO
(about 0.5Vp-p) at pin (23) of IC2201?
YES
Replace IC2201.
Check the line between pins (78) and
(79) of IC2201.
YES
Is there the luminance output signal
(about 0.4Vp-p) at pin (79) of IC2201?
NO
Is the V-H.SW.P. signal applied at pin
(81) of IC2201?
NO
Check the V-H.SW.P. signal line.
Check the peripheral circuits of pins
(13), (14) and (16) of IC2201. (Check
C2203, R2201, R2202, L2204,
C2205 and R2203.)
Check the line between pins (18) and
(19) of IC2201. (Check C2206.)
Check the line between pins (21) and
(42) of IC2201. (Check C2208.)
Check the line between pins (26) and
(39) of IC2201. (Check C2212.)
YES
Is there the luminance output signal
(about 0.5Vp-p) at pin (39) of IC2201?
NO
Is 5V voltage applied at pin (36) of CCD power terminal IC2201?
Is the CCD control voltage of about 5V applied to pin (37) of IC2201?
Check to see if the CCD clock signal (about 7.16MHz/0.5Vp-p) is applied from pin (69) to pin (44) of IC2201.
Check the line between pins (23) and (24) of IC2001. (Check C2210.)
Recording and playback possible, but no colors.
NO
Is 5V voltage applied at pin (61) of
chroma power terminal IC2201?
YES
NO
Is there the chroma input signal
(about 403mVp-p/Burst) at pin (46)
of IC2201?
YES
Is there the chroma input signal
NO
(about 508mVp-p/Burst) at pin (58)
of IC2201?
YES
Is there the chroma output signal YES
(about 286mVp-p/Burst) at pin (55)
of IC2201?
NO
Check the line between pin (55) of
IC2201 and pin (5) of IC1301.
(Check R5503 and C5510.)
Replace IC2201.
YES
FLOW CHART No. 2-15
Check the peripheral circuits of pin
(61) of IC2201 and the PC5V line.
Check the line between pins (46) and
(60) of IC2201. (Check C5512.)
YES
Make sure oscillation (3.58MHz)
occurs at pins (71) and (73) of
IC2201.
Check the line between pins (35) and
(58) of IC2201. (Check R5505 and
C5515.)
YES
Is there the chroma output signal
(about 508mVp-p/Burst) at pin (35)
of IC2201?
NO