Awful Waffle - Lights but No sound

[jetfeeds]

Hey Legends!
I've run into some issues when assembling my first Pedal PCB build. From the audio jacks I have the signal from sleeve to sleeve but not tip to tip - any idea on how to find out exactly where the issue lies?

 

[Big Monk]

Hey Legends!
I've run into some issues when assembling my first Pedal PCB build. From the audio jacks I have the signal from sleeve to sleeve but not tip to tip - any idea on how to find out exactly where the issue lies?

View attachment 23588

So you don't pass sound even in bypass?

 

[jetfeeds]

So you don't pass sound even in bypass?

No sound in bypass. I'm thinking the issue must lie somewhere between the tip to the tip haha (so anywhere really)

 

[Big Monk]

No sound in bypass. I'm thinking the issue must lie somewhere between the tip to the tip haha (so anywhere really)

It's your switching circuit then. Check your switch connections and where they land on the board.

 

[JamieJ]

I think the bottom row of your switch is wired incorrectly. It looks like it connects to the central pin rather than bottom right. Check it against the build doc.

 

[Big Monk]

I think the bottom row of your switch is wired incorrectly. It looks like it connects to the central pin rather than bottom right. Check it against the build doc.

I think he actually has that correct:

 

[jetfeeds]

I think the bottom row of your switch is wired incorrectly. It looks like it connects to the central pin rather than bottom right. Check it against the build doc.

Thanks,

I think he actually has that correct:

View attachment 23591View attachment 23592

haha beat me to it, was just trying to screen shot the doc. yeah the switch is wired as the diagram specified and the light switches on and off but no sound

 

[Big Monk]

Thanks,

haha beat me to it, was just trying to screen shot the doc. yeah the switch is wired as the diagram specified and the light switches on and off but no sound

Check all your connections. No sound in bypass is either jack or switch related.

 

[spi]

Do you have an audio probe?

 

[spi]

No sound in bypass is either jack or switch related.

This is not a true bypass circuit.

 

[Big Monk]

This is not a true bypass circuit.

Ah. Let me get a wet paper towel and wipe the egg off my face...

 

[jetfeeds]

Do you have an audio probe?

is that on my multi meter?

 

[spi]

is that on my multi meter?

Maybe if you have a fancy one, but unlikely.

If not, you can make one with a few components. Basically you want to listen to the audio signal at different points in the circuit to see where the signal is breaking.

Audio probe Instructions | PedalPCB Community Forum

 

[Big Monk]

How does the bypass work in this circuit?



Bottom lugs connected is "On", i.e. LED connected and P1 to ground.

What is the bypass state then? Ground is lifted and P1 connected to P2. I've never seen this configuration before.

 

[spi]

Just a sanity check here, which IC did you use?

 

[jetfeeds]

How does the bypass work in this circuit?

View attachment 23593

Bottom lugs connected is "On", i.e. LED connected and P1 to ground.

What is the bypass state then? Ground is lifted and P1 connected to P2. I've never seen this configuration before.

Ive never come across this one either

 

[jetfeeds]

Just a sanity check here, which IC did you use?

LM741CN

 

[spi]

What is the bypass state then? Ground is lifted and P1 connected to P2. I've never seen this configuration before.

Check this for some info:
Tracing Journal: Crowther Hot Cake - Aion FX

 

[spi]

Is there a cover or insulator between the pot under the PCB and the PCB?

 

[jetfeeds]

Is there a cover or insulator between the pot under the PCB and the PCB?

yep I have a rubber cap on the pot under the pcb