Vero build help (Mind Warp)

[jwyles90]

Hey all!

I know this isn't a request for PCB help, but I've hit a wall with this one and was hoping another set of eyes (or brain) could help me figure this out. I recently finished this Mind Warp vero build, and it isn't cooperating with me. I'm getting signal when bypassed, but when I engage the pedal I'm not getting any sound of it aside from this weird like, chirping LFO type noise. It almost sounds like I can hear the LFO LFO-ing when I adjust the rate and depth knobs, but I'm not getting anything else out of it. I've replaced the chips, double-checked for any bridges, checked all my cuts to make sure they were actually cut, checked the input/output to make sure they weren't going to ground, and measured voltage at the diode, Op-amp, and regulator. I'm getting normal readings for all of it, so at this point I'm pretty stumped as to what could be causing it to not work.


Any help is much appreciated!

 

[SillyOctpuss]

Do you have an audio probe? If you're voltages are fine you're at the stage you'll need one.

 

[jwyles90]

Do you have an audio probe? If you're voltages are fine you're at the stage you'll need one.

I do have one. Haven't busted it out yet since I've been trying to pace myself with troubleshooting to not get too frustrated, but I can give it a shot this weekend.

 

[SillyOctpuss]

I do have one. Haven't busted it out yet since I've been trying to pace myself with troubleshooting to not get too frustrated, but I can give it a shot this weekend.

I'd start going through the circuit to see where you're getting audio to try and narrow down your problem.

 

[BuddytheReow]

You'll also need the schematic to understand which components to check

 

[SillyOctpuss]

You'll also need the schematic to understand which components to check

They have a link to the FSB thread with the schematic on it linked in the vero site listed above

 

[Locrian99]

I don’t think it would cause complete loss of signal like you are mentioning but are you testing the circuit in the dark. Or with something to shield light from your Ldr/led. You can go over the top and do like a heat shrink thing that works pretty well for it.

Did you audio probe it? Where are you losing signal?

All the offboard wiring looks good assuming it’s going to the correct pot lugs etc (I think 95% of my vero mess ups are in offboard wiring).

This looks somewhat similar to the little angel chorus circuit that from the comment threads on the stripboard layout sites had many people tearing their hair out.

You say your voltages are good mind sharing them. Might be something you are missing there possibly.

 

[Sturdag Lagernathy]

Possible short on solder side legs 6-7 of 2399? Another on solder side legs 5-6 of TLO72?