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Incredibly clear!!!! Well done, complete and wonderful. It could not better than this!!!!
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Thank You for fast delivery for the sheme.
Everything allright.
Thanks & best regards Franz
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again you did a very good job. It was fast too. Photocopy are really readable and clear
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Probably it never existed a 1081 official service manual from Commodore, it's look more like a NAPCEC service manual & diagrams compilation of the 1084 series and his variants, like the nap6523, 8cm505, 1084S, 1084P and obviously the 1081. It's more complete than other scans and the quality of the scans also are far superior. It has two circuit diagrams variants of the 1081, mono and stereo versions. It doesn't include a diagram for the Philips CM8500 or CM8501, they look like the 1081 but they are slightly different.
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Rapid, clear well done as all the scheme I downloaded from this site. Great job very functional and very useful
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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