Parentheses Fuzz

[Hawt_dawgs]

Coming here as a last resort. Got the pedal all soldered up went to test it and no Input signal even when bypassed. I can tell the pedal is working though because when I turn the knobs the signal is affected. I’ve checked everything.

- Tried a different input jack
- Checked input jack wiring
- Tried a different instrument cable
- Checked for bridging solder joints
- Checked for cold solder joints
- Checked wiring on foot switch

I bought everything on the parts list and double checked everything before soldering. Followed the wiring diagram on the website too. Any ideas would be appreciated.

 

[BuddytheReow]

Post some pics. If bypass isn’t working there’s something off in your off board wiring

 

[jwin615]

Agree. Something with wiring or a borked switch.
When you say turning the knobs impacts the signal, I assume this is when audio probing or scope probing?

 

[Hawt_dawgs]

Agree. Something with wiring or a borked switch.
When you say turning the knobs impacts the signal, I assume this is when audio probing or scope probing?

So the foot switches turn on their corresponding effect. If I turn the knobs I can hear the hum/hiss getting louder and the tone knob introducing more noise etc. The only thing I get as far as input signal is the hum/hiss quiets down when I touch the guitar strings.

 

[Hawt_dawgs]

Just a sanity check for one of mine early mistakes. Have you tried the instrument in the "output" jack and the amp as "input".
Since wireing and schematics most often show the circuit as seen from the underside of the pedal, it's easy to confuse the path in the beginning.

Yeah, I tried this too. Like I said I can hear the hum/hiss getting affected when I turn the pots so I know the output works.

 

[lund]

sorry, I managed to delete my previous post. (my hams for fists and a small smartphone screen doesn't mix)

Pictures would aid trouble shooting help a lot. The longer you stare at the same problem, the more likely it is to miss the obvious.

As you get a change in sound for all knobs, we should suspect the circuit it self to be at least mostly correct. Not getting any signal in bypass points to something being wrong with the wiring, or the path to the wiring.

I would recommend building an audio probe, that way you can trace the signal to where it disappears. It's also possible to use a DMM and check for continuity along the audio path, as well as shorts to ground.

I usually start by following the signal path from the input. That helps you bisect the problem and narrow down the area to trouble shoot.

In this case, set the foot switches to bypass, and check that the tip of the input jack reaches the correct lug(s) on the foot switches. (the order is octave -> dist -> boost if I remember correctly)