Schematic and/or service manual for Yamaha M-80 Amp

[barddas]

I have a project for college and it is to fix a Yamaha M-80 amp and I require a schematic unit is locked into protect mode all power transistors test good. Thanks in advance

[pjcolombo1]

I have this same amp, with the same nagging problem....I wonder if you ever found out wha the problem was? I do have a service manual for this AMP...what do I need to replace?

Paul Colombo
Detroit MI.

[pjcolombo1]

I forgot to put my email in the last post, about this problem.
[email protected].

Thanks again...

Paul..

[Heddarn]

Did any of you find the solution to this problem?
I have the same amp whit the same problem.