SOLVED Magnetron LED problem

[SlowAudio]

Hi all. I am new here and this is my first post.

I built the magnetron delay and tested it using the auditorium platform. It worked in the test. However, I noticed the bottom LED was a little faint. I figured it was because I just stuck in LED in there to test, and the connection was a little weak.

I boxed it and it worked great, except that the LED that indicates rate did not work at all. I used a ring LED foot switch. I took it apart and tested the LED. It works. I have continuity on my DMM from the hook up wire to the other side of the board for both wires. There does not seem to be any power coming through. More accurately, it’s a very low number that hovers around 0 V. Posted a pic but the hookup wire in on the other side so I can more easily solder it to the ring LED pcb.

I’m very new to pedal building and electronics in general, so I’m not sure what to do next. Appreciate any help. Thanks!

 

[SlowAudio]

Attached picture from testing. It was a little strange how dim the green led was.

 

[SlowAudio]

Adding a couple more pictures. I just replaced R103, which seems to be the resistor before LED2 in the circuit. It had a little bit of blue film showing on the underside of the board, which made me suspicious that it was blocking the contact. It did not fix true problem unfortunately.

 

[Robert]

Where is your Depth control set?

The brightness of the LFO indicator LED is determined by the Depth control.

 

[eh là bas ma]

Hello, welcome !

Did you insulate the three bottom pots ? If they touch the circuit, it will create a short. A piece of cardboard or plastic should do.

 

[SlowAudio]

It was the depth. I don’t know how I missed it but it was the depth. I feel embarrassed but also relieved

 

[SlowAudio]

Hello, welcome !

Did you insulate the three bottom pots ? If they touch the circuit, it will create a short. A piece of cardboard or plastic should do.

I put electrical tape under the pots because I forgot to order dust covers, but I’ve got some in my next shipment!

 

[SlowAudio]

Ok so this is marked as solved, but for anyone who comes across this issue in the future:
The depth pot being all the way down was causing testing issues with the LED, but that wasn't the problem. There likely a short under one of the pots that was poking through the electrical tape (clipped leads are far to sharp to be stopped by a single layer of tape) which I solved by cutting some plastic bottle caps into saucers and jamming them under the pots. I should have gotten dust covers in the first place, but either forgot or Tayda was out of stock, I don't recall. Use dust covers!

There was also a short between the ring LED (aka illuminated footswitch) and the enclosure. This was maddening because everything worked until I put it back together. I had run hookup wire to the LED PCB, it stuck out just a little too far. The contacts are very close to the enclosure. Hope this helps!