> From: sndgroom@...Probably needs to be replaced. But first make sure that Z54-1 and Z54-7 have reasonable voltages on them. The latter should be 2.5V, tweakable via the R45 trimpot. The former should have a sequence of 24 different voltages from 0 to 5V, reflecting the positions of the sliders, etc. Make sure neither is significantly outside the 0 to 5V range, because, even with the clamp diodes, that could be pushing current through the ADC input protection diodes, heating it up. If that looks okay, then definitely replace the 0804.
>
> The ADC converter 0804 is hot!
This certainly accounts for getting no sound. It can't measure the position of any slider, including the master volume control.
Anything else feel hot? ;-) Except the CPU, that is--that's always hot.
--
Ciao, Paul D. DeRocco
Paul mailto:pderocco@...