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The Service Manual was just as expected, complete with schematics and I was able to download it in less than an hour after I ordered it. The only problem with these is that the schematics are hard to read due to the small font. I could remedy this by printing them on a larger printer.
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Also this Service Manual are very well maked and with a very good definition !
Very fast download speed !
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The manual you sent me was excellent. It included clear, readable diagrams and a usable parts list. I would surely use your service again. Thanks
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Payments were processed quickly and items were exactly as described. I will use owner-manuals.com in the future for any other manual needs.
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The Technics manual was very clear and I was able to solve my technical problems.
I did not think that anyone kept these manuals and was pleasantly surprised to find them on the Internet and at an affordable price.
I would recommend Owner Manuals as a first source of technical products for ‘dated’ equipment manuals.
Ian
NO.20 FLOW CHART NO.21
VC-A423M VC-H823M
Playback Although picture played back, color does not appear (E-E mode is possible). FM signal (approx. 0.4 Vp-p) NO between pins(79) and Is voltage 5V applied to chroma Check the periphery pin(61) of
input to the pin(78) (78) IC201. power terminal pin(61) of IC201? IC201 and PC 5V line.
YES
Is chroma signal (approx. 403 Vp-p) input to the pin(79) IC201? pin(46) of IC201. (Check C512.) mVp-p/Burst) input into the
YES YES Is V-H.SW.P. applied to Check whether the pin(71) and pin(73)
NO Is luminance signal (approx. 0.4 Check between the pin(60) and
pin(46) of IC201? NO
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 C515.) mVp-p/Burst) input into the
pin(58) of IC201? YES
NO YES YES 286 Is chroma signal (approx. 508
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.) pin(54) pin(35) of IC201? NO
YES output to mVp-p/Burst) input into the
Is luminance signal (approx. 0.5 Check between the pin(18) and
Vp-p) input to the IC201? pin(19) of IC201. (Check C206.) NO NO pin(54) of IC201. (Check C514.) Is luminance signal (approx. 0.5 NO Check between the pin(21) and
46
YES
YES Check between the pin(55) and
Vp-p) input to the IC201? pin(42) of IC201. (Check C208.)
YES Replace IC201.
Is luminance signal (approx. 0.5 NO Check between the pin(39) and Vp-p) input to the IC201? pin(26) of IC201. (Check C212.)
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
Replace IC201.
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