Debugging Neo Vibe (No signal)

[Kevin Mitchell]

I'm hoping the issue could be something obvious but I'll post some voltages later. The bulb pulsates and the depth and speed seem to be functioning as well but all I can hear is the buzz going with the light. Even when I switch the effect I still get no signal from my guitar. The level pot doesn't seem to do anything. Just a loud pulsating buzz. Perhaps there is bad solder somewhere? I keep checking but I haven't found errors. I would like to know how you guys would go about this and where the issue could be.

I've done a pcb from Geofex.com of the latest neo vibe build.

[Kevin Mitchell]

I'm not sure why but the pdf file I've been using for the wiring doesn't show any connection on the output's sleeve. I've made a connection according to the pdf "vibeupdate" where the sleeve connects to the volume pot and this solved the signal problem somewhat. I now hear my guitar while the effect is off but when I switch it there is absolutely no sound now. Although the lamp is still pulsating as it should.

Not sure what I should do from here. I'll dig up my multimeter tomorrow evening.

[R.G.]

I'm hoping the issue could be something obvious but I'll post some voltages later. The bulb pulsates and the depth and speed seem to be functioning as well but all I can hear is the buzz going with the light. Even when I switch the effect I still get no signal from my guitar. The level pot doesn't seem to do anything. Just a loud pulsating buzz. Perhaps there is bad solder somewhere? I keep checking but I haven't found errors. I would like to know how you guys would go about this and where the issue could be.

Us listing a lot of possible problems doesn't help you much. It could be almost anything that interferes with the signal getting through the phase line - and there are several times as many of those possibilities as there are components, traces, and solder joints combined.

Get out the meter.