Tommy v3 No sound

[tedbrackets]

Hello this is my first build + first time to solder so excuse my messiness ..

I thought I had everything correct but I'm not sure why I'm getting sound only when bypassed also the led is working fine, so I'm not sure what is the issue exactly.

 

[BrainDrain]

Did you use pot covers on the bottom pots under the PCB? Your wiring looks ok and the LED working means there's voltage coming into the PCB.

 

[tedbrackets]

Yes I did on the 2 Lower Pots

 

[BrainDrain]

I just had a build where I did everything right and it turned out being a defective trace in the PCB. I added a jumper and it was all good. It's not that common although it's happened to me twice in about a year and a half. I'd check some voltages with a multimeter. The LED is lighting so voltage is coming in. I'd Start with the IC. The top right pin (pin8) on the IC should be 9v. Also, I'm Not sure if a broken dpdt switch would make the pedal not work but if you apply alot of heat to those dpdt switches it's possible to melt them inside. I usually solder one or two lugs then wait a bit and then another two etc.

 

[Barry]

Couple of those solder joints like the in jack to the board look suspect.

 

[Erik S]

Any chance you missed one side of the 5817?

 

[tedbrackets]

I just had a build where I did everything right and it turned out being a defective trace in the PCB. I added a jumper and it was all good. It's not that common although it's happened to me twice in about a year and a half. I'd check some voltages with a multimeter. The LED is lighting so voltage is coming in. I'd Start with the IC. The top right pin (pin8) on the IC should be 9v. Also, I'm Not sure if a broken dpdt switch would make the pedal not work but if you apply alot of heat to those dpdt switches it's possible to melt them inside. I usually solder one or two lugs then wait a bit and then another two etc.

Thank you that's very useful to know!

 

[tedbrackets]

Any chance you missed one side of the 5817?

View attachment 68208

Yes I fixed this one !

 

[BrainDrain]

I'd swap out the IC and recheck all your solder joints. If all the soldering, wiring and IC is ok and you're getting bypass signal and LED then I'd suspect it's one of the two switches that's defective or it's the PCB. I've never had a bad capacitor before but I guess it's possible?

 

[jimilee]

Typical troubleshooting steps are checking all your components, reflowing all your solder joints regardless of how they look and checking voltages.