Pioneer A-60 Protection

q520 wacky readings are most probably caused by r568 being open ..do you have a new resistor to replace it with ? if so replace it and lets see what happens ..
if you like you could look at the other resistors to rule them out .
on another note does r568 look burnt ?

No don't have one, I have to see if radioshack has one. It doesn't look burnt, looks just like its counterpart on the left amp side.
 
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