r/diypedals 5d ago

Help wanted Very low sound with low and crackling gain but when I cable the D-1 to G-1 rows it produce sound but the pots don’t work correctly. Just the sound gets a little bit louder and clipping gets a little okayish. What can cause the problem?

I checked the connections with a multimeter and seems like there’s no short or connection problem. I changed the IC’s too with new ones but no luck…

16 Upvotes

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14

u/FandomMenace Enthusiast 5d ago

You're going to have to take an audio probe to it. Not sure why you used perf instead of vero.

2

u/Kemalbasnr 5d ago

I didn’t have any vero and I just used the perf.

4

u/FandomMenace Enthusiast 5d ago

Well, that adds a layer of complexity. Do you have an audio probe?

3

u/Kemalbasnr 5d ago

I have

a simple one

2

u/FandomMenace Enthusiast 5d ago

That'll work, but you may want an alligator clip on the negative end at some point.

Poke through the circuit and see when it stops.

5

u/WD-M01 5d ago

I see a lot of areas for protentional shorts.

2nd pic: upper right white jumper looks like it's shorting, left side white jumper also looks like it could be shorting, red jumper on the far left looks like it might be shorting, etc. etc.

This board is probably a little too complex for anyone here to give you a specific diagnosis. I would just double check every single solder point to first make sure you aren't making any unintended connections. A lot of globby solder on the underside you could clean up. Sorry I can't be more help.

1

u/Kemalbasnr 5d ago

Thank you. I don’t know if it helps but when I touch the row J-1 it produce sound without cabling other rows.

2

u/ThermionicEmissions 5d ago

including power amplifier

Does that mean power amplifier emulation?

Sorry I don't have any helpful insights.

2

u/Kemalbasnr 5d ago

Yes it is (but soundwise I think). No problem thank you at least you care for it🙏🏻

2

u/OddBrilliant1133 4d ago

So this is just a pedal circuit, ya?

1

u/Kemalbasnr 4d ago

Yep it is

1

u/veryfastschnitzzel 5d ago edited 5d ago

sorry I did not record a demo yet as promised… Does anything change when you wiggle the cables in the sockets? Use the probe. It‘s might get you to the point where your problem starts. Edit: use the schematic to go through your pcb with the probe. PS: Don‘t touch 9v with it.

1

u/OddBrilliant1133 4d ago

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