Doc,

The mic trim pot is on a narrow PC board that also holds the mic/line switch, mic connector, and a few other components. The pot is not a separate item, however, a good repair technician could probably replace it without replacing the entire board. I would have to search my repair CD to find the part number for the board, but you could call Yamaha in California at (714)522-9000 and get the part number and the price.

Good Luck,

Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)