fender acoustasonic 30dsp has low output power

[nickb]

Thanks for the reply and sorry for the delay in getting back-- been very busy with other repairs but....
.... I think you mean R121 according to my print.... in any case the voltage on pin 8 is -3.1Vdc and
across R121 is -8.1V so greater than the .5ma you mentioned into the mute pin.
Any other ideas??

Thanks for your consideration,
Regards,
Raymon

Yes R121

I wonder if that has got a signal on it when it should not have? Set up 1V rms ( or peak whatever your desire) on TP36 and while that is happening measure the signal on the other side at the -ve end of C85 - it should be negligible.

If that is OK that only leaves C90, R107 and R117 to set the gain- check them. There's also the reference side R104 / C85 to consider.