Hello,
I got an old Boss TW-1 auto wah from a friend. It was broken, giving only a high pitched squeal instead of a wah/filter sound.
I changed the caps in case there was something wrong with them. Now I get a fuzzy sound (even with the pedal on bypass mode.
Any ideas how I can possibly fix it? Schematic attached.
Thanks in advance
(https://s31.postimg.cc/9ash3qfdz/Boss_TW-1_Schem.jpg) (https://postimg.cc/image/9ash3qfdz/)
Any chance you could post the voltages of ICs and transistors etc?
Also, have you tried following the signal with an audio probe? Perhaps find when the fuzz is introduced?
I will try to follow the signal and see if that gives me any clue. Thank you!