> From: sndgroom@...Unless R46 is broken, it shouldn't have any major effect. All it does is null the op-amp offset, so that the DAC will be as linear as possible, and the tuning will be accurate. If turning R46 makes a significant sudden change, I'd replace it. Otherwise, you should adjust it until you've got as close to 0V between the two test points as you can measure, ideally with a meter with 100uV resolution.
>
> Yes, I can now see the pulses "dancing" while playing note!
> The setting on R46 was, I believe" responsible as as soon as
> I moved the pot, the flow of waves started.
> BTW, still no sound. Anything else I can do?
Are you sure you have anything in the memory? It's common to get no sound if you haven't gone through the calibration procedure outlined in the service manual.
--
Ciao, Paul D. DeRocco
Paul mailto:pderocco@...