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This amp came in completely fried and beaten.
Because of a very higher value fuse replacement, all the power amp section was gone badly: power transistors, and all of the diodes and zener diodes around it were physically broken.
Now the funny thing that's driving me nuts is that I have good signal at pin 1 in U4A, good signal at pin 6 of the U7, good signal in both power transistors, BUT just a tiny almost inaudible signal at the speaker connectors.
If I plug the signal generator in the effects return, same thing, so the problem is definetely not in the "preamp".
I have ckecked all components around the power section and all appear ok or have been replaced for good ones.
And here I am... completely lost once again.
Any help?
Because of a very higher value fuse replacement, all the power amp section was gone badly: power transistors, and all of the diodes and zener diodes around it were physically broken.
Now the funny thing that's driving me nuts is that I have good signal at pin 1 in U4A, good signal at pin 6 of the U7, good signal in both power transistors, BUT just a tiny almost inaudible signal at the speaker connectors.
If I plug the signal generator in the effects return, same thing, so the problem is definetely not in the "preamp".
I have ckecked all components around the power section and all appear ok or have been replaced for good ones.
And here I am... completely lost once again.
Any help?
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