> From: sndgroom@...
>
> https://youtu.be/zI1MFh6nINc
>
> Yes, it seems strange such a dramatic change only by moving a
> bit a few chips. I double checked and their legs are OK and
> correctly placed into their slots. I'll try checking with
> more attention the power supply, but measuring yesterday
> around the ICs, all looked like OK.

If it's really that loud, then you should be able to see it on the output board, on Z3-1. If you see it there, check the MAIN OUT and DATA AUD inputs to the board. Is it affected by the master volume control? If not, does the master volume control vary the MAIN VOL voltage?

--

Ciao, Paul D. DeRocco
Paul mailto:pderocco@...