Archive of the former Yahoo!Groups mailing list: Yamaha CS80

I am looking for clues on where to start with this. I have perfect tune on every key and voice on every octave but ONE voice sometimes want to portamento itself from the last note played. It does it only within the range of the B2 to A3. I measured the voltage on the SH board for each voice and voice 4 has a voltage thats all over the place on the in AND out of the board.

I just got this CS50 shipped to me from across the country and when I opened it up, the far right voice card was only locked down by one screw. I dont know if I should look into replacing this card. I know somewhere where I can get a voice card. I am just not sure if that is a way I should go or I should be looking on a different board.

PLEASE, any suggestions on where to start. Or any ideas of of a likely culprit?