I tried to load my repair manual into the PC and because the manual is so old, the PC no longer supports the 32 bit CD and will no longer read the contents. Additionally, my repair guy, who was a genius at fixing Yamaha arranger keyboards, up and had a bad heart attack and had to retire. I'll call Yamaha to verify my statement above.
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.)