BSIAB2 problems, no sound, led problems.

[fif_freakboy]

Well, I just finished building my first pedal and I have a few problems going on.
   First off there is no sound coming out of the pedal, nothing in bypass or when engaged. I spent an hour going over the pedal and found a cold solder so I fixed that and did not find any other issues but still no sound. Well, there's one sound and that is only when I accidentally touched the input lead on the jack and that was just a electronic buzz.
   Secondly when the pedal is in bypass that LED will light up and for some reason when I use the volume pot on the pedal when engaged or volume on my guitar engaged or bypass it acts like a dimmer switch on the LED. I have absolutely no idea what could cause that. Forgive me for my very newbie questions but since this is my first build I am very much at a loss.

[Ice-9]

It sounds like you have a possible wiring problem on the switch as if it's correct you should get a btpassed sound, other possiblities could be bridged solder connections, can you give some more info on what pcb you have used and what switch and jack wiring you have used.

[Hupla]

I reckon you have miss wired the switch as well, and are shorting something out. Not sure about the volume pot unless you have soldered the top of it to the + voltage and are bringing down the voltage over the whole circuit. Might be a solder bridge there alright.

If you could post all the voltages and answer the questions in the debugging section it would be helpful.

[fif_freakboy]

Its the BSIAB2 kit from General Guitar Gadgets and I followed their instructions on their site, I'll do my best to get those voltages tomorrow. Thanks guys.

[darron]

getting the bypass sorted out would be the first and most important thing. the bypass switch doesn't need any power so don't bother plugging in a battery or anything due to that 'dimmer' issue for now.

as far as i can think with no sleep, for the bypass to work you need to check three simple things:

1) the audio signal should continuity from the input tip right through to the output tip, so use your multimeter and check that there's a good connection right across, if not find where it breaks and fix it.

2) the ground from the sleeve of the input should have continuity to the ground on the output, same thing as above.

3) the audio signal from the input should have no short to ground as that would give you full attenuation. so if you are reading practically zero ohms from signal to ground while nothing is plugged into the input or output, then you'd need to sort that out.