I only see a U1, U2 and U3, all LM358N. There is a non-zero DC input on
the + input of U3, with the amp on and not keyed. So I think that the DC
offset may be coming from U1 or U2. I would replace them all if I had
them handy.
Hey, check out R22 a 100 ohm resitor to ground on one ouput of U1! None
of the other outputs have one. Shouldn't it be connected to the opposite
end of R35? to make the load on all of the opamps and zero ohm resistors
the same?
> While you've got it opened, though, you might consider
>changing out U5 on the distrib board.
>
>
>
>
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