SHARP VC-A412U
Instrukcja Serwisowa

NO.21 FLOW CHART NO.22

Playback Although picture played back, color does not appear (E-E mode is possible).
NO FM signal (approx. 0.4 Vp-p) between pins(79) and Is voltage 5V applied to chroma Check the periphery pin(61) of YES

input to the pin(78) (78) IC201. power terminal pin(61) of IC201? IC201 and YC 5V line.

Is luminance signal (approx. 0.4 NO Check between the pin(60) and Is chroma signal (approx. 403 Vp-p) input to the pin(79) IC201? mVp-p/Burst) input into the pin(46) of IC201. (Check C512.)
NO pin(46) of IC201? YES YES Is V-H.SW.P. applied to Check whether the pin(71) and pin(73)

pin(81) IC201? of IC201 oscillate (3.58 MHz)?
NO

V-H.SW.P. line. Check between the pin(58) and pin(35)
NO

Is chroma signal (approx. 508 of IC201. (Check R505, C515.) mVp-p/Burst) input into the

pin(58) of IC201? YES
NO YES YES 286 Is chroma signal (approx. 508 NO NO Vp-p) input to the IC201? pin(19) of IC201. (Check C206.)

Is luminance signal (approx. 0.25 Check the periphery of pins(13), Vp-p) input output to the pins(13), (14) and (16) of IC201. (Check (14) and (16) of IC201, respectively? C203, R201-2, L201, C205, R203.)

YES input into mVp-p/Burst) output to the

Is luminance signal (approx. 0.5 Check between the pin(18) and

pin(35) pin(54) of IC201?

NO NO pin(54) of IC201. (Check C514.) Is luminance signal (approx. 0.5 Check between the pin(21) and

47
NO Is luminance signal (approx. 0.5 Check between the pin(39) and

YES Check between the pin(55) and

Vp-p) input to the IC201? pin(42) of IC201. (Check C208.)

YES Replace IC201.

Vp-p) input to the IC201? 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?
YES

control voltage approx. 5V applied normally to pin(37) from the pin(57) of IC201? Is CCD clock signal (approx. 7.16 MHz/0.5 Vp-p) applied to pin(44) from the pin(69) of IC201?
NO Vp-p) input to the pin(23) of IC201?

Is luminance signal (approx. 0.5 Check between the pins(24) and (23) of IC201. (Check C210.)

YES

VC-A412U/A413U VC-H812U/H813U

Replace IC201.