Ping troubleshooting

[LateCentury]

So I just finished building my Ping. All components in place, wires hooked up. Plugged it in and it passes a clear signal to the amp. Once I turn on the switch, the LED lights up but it makes what I would call a sputtering static sound and the guitar signal is cut off completely. I'm going through and checking all the wires, solder bridges that I can see, basically everything I can get at without taking off the reverb brick.

Does anyone have any ideas as to what this sound could be indicating?

[madbean]

Can we see a pic of the build and wiring?

[LateCentury]

[jimilee]

What's the solder side look like and have you reflowed everything yet?


Sent from my iPhone using Tapatalk

[LateCentury]

What's the solder side look like and have you reflowed everything yet?

Mainly everything is covered with the reverb brick. Contemplating how to heat and remove tin pins at once... 

[jimilee]

Desoldering iron or braid. Take some voltage Readings before that though.


Sent from my iPhone using Tapatalk

[madbean]

Are you sure you have that DC Jack wired correctly? I can't tell from the angle of the pic. You won't be able to use that jack anyway - it will cause a short with the enclosure. Use plastic/insulated jacks for DC.

[LateCentury]

Are you sure you have that DC Jack wired correctly? I can't tell from the angle of the pic. You won't be able to use that jack anyway - it will cause a short with the enclosure. Use plastic/insulated jacks for DC.

Ah, good to know. I'll swap it out and try it again.

[LateCentury]

Is it possible I could have ruined something by not having the DC leads hooked up right and powering it on?

[Leevibe]

I think you have the opamp flipped.

[LateCentury]

I think you have the opamp flipped.

I'll try that next. Is there a possibility i will (or have) burned something out or ruined any components by having this flipped and sending power to it?

[madbean]

Yeah good call - IC is wrong way in. It's possible it could have been damaged but in my experience it's probably fine. Flip it around, check your voltages on pin8 and 4 to make sure they are right.

[m-Kresol]

I think you also wired the stereo pot in the wrong way. I think you swapped rows and columns there, though it's hard to see on the picture.

[LateCentury]

Ok, the IC was definitely in backwards. Now, when I switch it on I get no signal, but also no static. Whats interesting is that I accidentally bumped one of the #1 pins in the Room pot against the metal end of the guitar cable and it gave off a high pitch squeel but with reverb, so something is definitely working. I can also turn up and down the pots and they seem to be changing the sound as well.

Here's how i have the Room pot hooked up.


I did also notice that when the switch is on and I unplug the power, there is no bypass signal. It completely cuts out. Is that the way its supposed to be? Might i have the IN/OUT jacks wired wrong somehow?

[m-Kresol]

If the pot is indeed wired like this, it should be ok