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Troubleshooting KARL (no signal at OUT1)

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Hi! I just got a KARL PCB with SMD presoldered. After assambling the OUT1 there's no signal at OUT1.

Signal in IN1 (only) => output at MIX and OUT2 (but not OUT1).

Signal in IN2 (only) => output at MIX and OUT2.

Signals in IN1 and IN2 => output signal from IN2 at MIX and OUT2 (but nothing at OUT1).

It's not a problem with the OUT-Jack, same problem while checking signal at the resistor in front of the OUT1-Jack.

Does anyone know the problem with this pre-soldered module?

Is it perhaps possible to get the schematics to continue tracing?

Thanks!

4 comments

Kommentare (4)

axel

Nov 09

Reason found ... It was apparently too obvious to see 😀.

st-modular

Nov 09

Replying to

I'm glad you found it! Just to confirm, it was pre-soldered, correct? Please reach out to your vendor for assistance.

st-modular

Nov 06

Hey Axel, The quickest solution would be to reflow the OUT_L socket, the Resonance potentiometer, and the filter selection headers—particularly the ones with descriptions that include *_L (I assume by "OUT 1" you’re referring to OUT L). Are all jumpers set according to the jumper setting documentation?

I have forwarded the schematics by email. Cheers,

Stefan

Edited

axel

Nov 06

Replying to

Hi Stefan,

thank you very much.

I've already reflowed all sockets and potentiometers, but i'll give it another try.

Yes, OUT 1 is OUT L.

I checked the jumper settings and tried different jumper settings with no success.

Thanks for the schematics.

I'll come back after a new try.

-Axel