Disklavier

I have a new DC3A. When I try to slow the tempo on music played from 
a floppy disk, it will slow only to 50%.  For very fast pieces this 
may be still too fast if I am trying to analyze a segment to improve 
my playing of the piece.  I have a Clavinova and it will go as slow 
as I want.  Any tips?


Thanks

John