SOLVED LED alway on Greengage

[Atom ant]

Hey folks-I know this has been asked. I followed the instructions that robert gave for troubleshooting this, and am still having issues.

Pedal works great otherwise-

I reflowed all of the joints on the 3pdt board.

I pulled sw and light remains on.

I pulled and reflowed the anode and cathode on the pcb. Still nothing.

Any other ideas? I pulled the board to inspect the back side to make sure there aren’t any bits of wire shorting.

Does anything look amiss?

 

[lowpitch]

Cathode leg could be touching the metal casing of the LED bezel by the looks of it. LED will always be on then because the metal bezel and by extension the cathode is grounded through the enclosure.

 

[Atom ant]

Cathode leg could be touching the metal casing of the LED bezel by the looks of it. LED will always be on then because the metal bezel and by extension the cathode is grounded through the enclosure.

I checked, and the spacer is higher then the bezel, which means the cathode would have to be lower then parallel with the top, so I don’t think thats it. But when I reassembled it, its possible that the bezel was touching the in-ground-sw-out on the main board. To confirm this, I removed the entire board and used power jumpers to power it. Light still on.

Edit to say, I removed the LED and wiring, cleaned, and replaced with a new LED. Still on. Not sure how to proceed from here.
I don't think it's the switch, since the light stays on when I remove sw.

 

[Lytt Effects]

So when you say you removed the board, did you remove the LED as well? As in, did you eliminate the enclosure altogether from the equation?

If the LED is staying lit, it means the ground connection is there. If you did remove everything entirely from the enclosure - and I mean everything, literally place the enclosure 10’ away on the other side of the room while testing - then it has to be the switch. Did you check continuity in the switch for this?




When the pedal is disengaged, there should be no continuity between the highlighted poles. Also check for continuity on the GND and SW pads. There should only be continuity there when the pedal is engaged.

 

[Atom ant]

So when you say you removed the board, did you remove the LED as well? As in, did you eliminate the enclosure altogether from the equation?

If the LED is staying lit, it means the ground connection is there. If you did remove everything entirely from the enclosure - and I mean everything, literally place the enclosure 10’ away on the other side of the room while testing - then it has to be the switch. Did you check continuity in the switch for this?

View attachment 93847


When the pedal is disengaged, there should be no continuity between the highlighted poles. Also check for continuity on the GND and SW pads. There should only be continuity there when the pedal is engaged.

I removed the entire board from the enclosure. Not quite 10 ft, but yes, only the circuit on the floor with power. The LED still lit. I removed all the off-board wiring, cleaned the board, and am re wiring. I also replaced the switch and the 3dpt board. Just gonna eliminate all the maybes.

 

[Atom ant]

Whelp-I just finished re wiring all the offboard wiring. New switch, new 3dpt board, and solid core wire. It works just fine now! Idk. Probably the switch? Maybe a short under the board?

Anyway, thanks to the board for the input! Report coming soon.