Amp cuts in and out, when it cuts out you can still kinda hear it but it is not very loud. I think it might have something to do with the FX jack cus it cuts out alot when i have pedals plugged in, but it also does without FX plugged in. It usually happens more in the summer time than the winter, my guess is it has something to do with moisture. Any help?
By pass the signal from C66 upper lead to C69 upper lead. Upper lead means from the control knob up. If no sound, you might have the bad gain pot. If there is sound, then you move the bypass signal to C69 lower lead. If no sound, you might have bad treble pot or C66 fail open( very rare)
Often the bypass contacts on the FX insert jack fail to close. These jacks are really poor and after plugging in a plug several times the bypass switch contact becomes sprung so as to not make good contact causing symptoms like yours.
Open the unit and inspect the jack. You can bend the contacts to tighten them BUT they will fail again.
Externally sometimes you can make a short jumper cable to connect the preamp out to the PA in to bypass the failing contacts.
On an insert jack, you can just wire a TRS plug tip to ring and plug it in.
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