Lemon Rockerverb- no sound when engaged

[megatrav]

I've been working on this build from guitar pcb mania.
I have bypassed sound. No sound when engaged but I do have an LED.
I took some shots of the board and I can't spot any bad connections so I think I might have the switch Ground and Control backwards. The PCB only says CNTRL.
I haven't tried swapping them yet but I wanted to post here to see if anyone might catch something else I may have done wrong.

Thanks!

 

[temol]

no... you are bypasing the signal path through the switch. There's no engage or bypass for the audio now, it's on all the time. Switch only turns the led on. At least in theory....
I'd desolder all the wires except in/out/supply to eliminate miswiring of the switch/led. Try not to lift the pads.

 

[fig]

Fantastic read and excellent troubleshooting folks. Hang in there @megatrav !

 

[megatrav]

In the Original wiring, was the Led OFF in Bypass & would Light up in the ON position ?????

Yes the LED worked fine

 

[music6000]

Yes the LED worked fine

Remove the IN wire from the PCB & see if you have Continuity with IN pad & Ground pad on PCB!

 

[megatrav]

Remove the IN wire from the PCB & see if you have Continuity with IN pad & Ground pad on PCB!

I will definitely try this later

 

[megatrav]

I just want to say thanks @music6000 and @temol for chiming in and keeping at it with me. I'm learning so much

 

[megatrav]

Removing IN wire from PCB and IN and Ground do not have continuity @music6000

 

[music6000]

Removing IN wire from PCB and IN and Ground do not have continuity @music6000

Test Ground pad and Right side of C1 pad pictured in Red Circle :

 

[megatrav]

Test Ground pad and Right side of C1 pad pictured in Red Circle :

View attachment 16768

10-4. No continuity there either

 

[music6000]

10-4. No continuity there either

Test Ground wire & IN wire on Footswitch for Continuity.
Should be in Bypass, Not in ON mode !!!
Test Ground Pad on PCB & Left C1 Pad for Continuity.

UPDATE : I hope you don't have a Dud or Momentary Footswitch!!!!!

 

[music6000]

Test Ground wire & IN wire on Footswitch for Continuity.
Should be in Bypass, Not in ON mode !!!
Test Ground Pad on PCB & Left C1 Pad for Continuity.

UPDATE : I hope you don't have a Dud or Momentary Footswitch!!!!!

I have to leave now for my 2nd Covid shot, No Retreat, No Surrender !!!

 

[megatrav]

Sorry, I was testing with the in and out jacks wired direct to the board.
However, with it wired this way, using an audio probe, I get signal up until C4. No signal coming through there

 

[megatrav]

Test Ground wire & IN wire on Footswitch for Continuity.
Should be in Bypass, Not in ON mode !!!
Test Ground Pad on PCB & Left C1 Pad for Continuity.

UPDATE : I hope you don't have a Dud or Momentary Footswitch!!!!!

I can't imagine I do have a momentary switch since the LED stays lit

 

[megatrav]

I should also mention that I am getting audio through the gate of Q1 but not the source or drain. Is that normal?

 

[temol]

I should also mention that I am getting audio through the gate of Q1 but not the source or drain. Is that normal?

No...
Yo have to inspect every solder joint on a pcb (both sides), make sure that transistors are seated firmly in the sockets. Also check the adapter boards for shorts.

 

[megatrav]

No...
Yo have to inspect every solder joint on a pcb (both sides), make sure that transistors are seated firmly in the sockets. Also check the adapter boards for shorts.

I didn't take any pictures, but the solder joints look shiny to me. No bridges or anything either. I also have continuity between the pads on the adapter board to the pads on the top and bottom of the main pcb

 

[music6000]

I didn't take any pictures, but the solder joints look shiny to me. No bridges or anything either. I also have continuity between the pads on the adapter board to the pads on the top and bottom of the main pcb

Do you have the Adapter Boards in sockets or Soldered directly to main board?

 

[megatrav]

Do you have the Adapter Boards in sockets or Soldered directly to main board?

They are soldered direct to the board

 

[megatrav]

I would consider taking them out and putting in different ones but I don't think that is the issue. Maybe a trace is damaged somewhere?

 

[temol]

To verify this you can check continuity between transistor legs and components connected directly to transistor.
Connect one probe to transistor leg (adapter board seated in the socket), scond probe to the component leg connected to the transistor. Continuity between legs of the components, not between solder pads.