Yamaha CVP 303 Notes Out of Tune

by Ron
(Fountin Hills Az)

My Yamaha CVP 303 Clavinova has notes that are out of tune, usually sharp. The notes vary and are usually in the third and fourth octave. Also some notes pitch varies right before your ears. Sounds similar to the doppler effect

The piano is tuned flat to avoid the effect of strecthing. Fzctory reset help but only briefly.


Any ideas would be welcome.