Disklavier

Anyone have any good troubleshooting tips on this problem?

 

It appears to be an overtemp problem on one of the driver boards, as the
problem does not happen immediately.  After a disk is inserted, the piece
will play for a short time, then this error message appears.  You then have
to power off then on, to play it again, but the error comes right back in
shorter and shorter duration.  Even if you stop the playback, the problem
will happen, given a minute or so.  Sounds like a driver circuit is
overheating, even without any key solenoids being used.  

 

Thanks for your help.

 

Brad