power acoustic 620-2

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i am tryiing to fix 2 of these identical amps at the same time, i hope to save money on shipping when i order parts. they have completely different symptoms

this one can actually make sound. the problem is that it is very scratchy. i need to have the level turned almost off for it to make sound and as soon as i raise the level the test speaker goes crazy. nothing seems to be getting really hot and i cant see any burnt parts.

i measured the op amps and one leg is reading 26v i figure this is probably a good place to start
 

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