Muffin fuzz quit working

[hankspencer]

Have a muffin fuzz, green russian version, that I built a few months back. Worked well but then stopped working. Looking for some advice on where to start. I've reflowed everything and have started chasing voltages. Any thoughts would be appreciated. Think I am too close to it and frustrated

 

[Erik S]

My money would be on something off-board. Footswitch, jacks, those wired pots maybe.

Sounds like a great job for an audio probe. Do a search here for how to build / use one if you don’t already have one.

 

[hankspencer]

Hadn't tried that yet because my test amp was down. Got it fixed and ran a test.

I get signal on the sustain pot (b100k) that is equal to my input signal (1khz square wave). Signal on the volume pot (b100k) is there but barely noticable when turned all the way up. Will send some scope pictures when I get a minute