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Exactly what was needed to assess the product - excellent value and great service
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A site where discontinualed schematic diagrams and back dated information can be found on discontinued radios tv's and any electronic equipment can be found. Newer manuals either Service and operating manuals. Radio amateurs should find this site a great source for ham radio equipment manuals. I will return to this site should I need information on any electrical equipment. priced easy to download in a PDF format and print pages need to undertake the repair.
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Quality scan of the original. All the detail necessary to troubleshoot, repair and adjust the unit. I'm sure I will be downloading more manuals in the future as the need arises.
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Exactly as described, a Service Manual complete with the schematics and PCB layout delivered in a timely manner. Many thanks for the great service.
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some of the writing is a bit blur but the part in the schmatic was great and i have fixed the machine thanks
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.
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