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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
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Great copy of the manual, has all information required for servicing,
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I work at an authorized service center and I can tell if a manual is as it should be. This one is. It may be a scan, but a very good one at that. The interesting part for me was the curcuit diagram which was scanned at high quality, making it as good as the original. I will definitely be back as a customer. I need not say this, but I will: the price was the best. Thank you owner-manuals.com .
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really a very good manual even sometimes the quality is no so good as before still very readible and very very useful!
TROUBLE SHOOTING TABLE
Circuits to be checked: » IC1500, 1501 and its peripheral circuit
!"#$
NO VERTICAL SCAN
IC1500
IC1501
Normal
Check the voltage at pin (6) of IC1501 and pin (6) of IC1500.
Abnormal
IC1500
(6)
IC1501
(6)
Check vertical trigger pulse at pin (31) of IC2801.
Check L1500, D1576 and R1576.
IC2801
(31)
L1500
D1576
R1576
Normal
Abnormal
Check IC1500, IC1501 and related circuits
Check IC2801 and its peripheral parts.
IC1500
IC1501
IC2801
Note 1: Make sure that not for the horizontal centering mode. Turn on the service mode. (Short J351 and J352.) Then when you press "- / --" key on the remote you can get in the horizontal centering mode. Note 2: The vertical sync signal must be fed to pin (2) of IC1000 in oder not to activate the vertical no-scan protector. Take this measure with the protector circuit for the troubleshooting on the following pages.
1 J351 J352 -/-2 (2) IC1000
25
29A-FX5 29A-FX8
E25
C25
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