Switch pop

[Rpschultz13]

This reverb pops when engaged. I suspect I’m doing the ground wrong. Thoughts?

 

[Nostradoomus]

Still might have a bad cap regardless, won’t hurt to switch it out for a film cap (most reliable I’ve found)

 

[Rpschultz13]

So I've had this apart now all day. Reflowed most of the joints. I don't even need the input jack wired up, the pop comes from the output jack... so it's not the 1M pull down on the input.

I also reflowed the wires going to the switch PCB... but not the switch itself yet.

I checked R48 on the output. Not sure where else to check...

 

[Rpschultz13]

Here's the full schematic.

 

[Rpschultz13]

I cut the LED, that's it. So what does that mean? How do I fix it?!?

I built another one of these and IT doesn't pop. So the circuit must be ok, I'm just doing something wrong on the 1st one.

 

[Rpschultz13]

So I replaced the LED and all is good. Is this a known issue? LED's causing switch pop? It's not in the signal path at ALL?!? How could a bad LED cause this? D2 below.

 

[music6000]

I would have suggested trying R48-10K, I have had this issue on a couple of Builds.
I did ask & you said it was only doing it when switched on, my experience was when switched On & Off & 10K to ground on the Output fixed it.

 

[Brett]

So I replaced the LED and all is good. Is this a known issue? LED's causing switch pop? It's not in the signal path at ALL?!? How could a bad LED cause this? D2 below.

View attachment 66411

D2 looks backwards in your schematic.