Re: QCX-mini No Audio

Roelof Bakker

Hello Sergey,

I had a similar issue with a QCX+ with the same voltages at IC10.

IC10 was not at fault, but the coupling capacitor between the volume potmeter and IC10.
This is C22 in the QCX mini.

When the junction of C22 and R37 is O V, the output at pin 7 will go high.
Which is the case with your QCX-mini.

I replaced this capacitor and the problem was solved.

Roelof, pa0rdt

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