The KN650 only retains 'User' sets for 80 minutes. The answer is to save to a
Floppy Disk.

It is important to save all your personal settings to a Floppy Disk everytime you use the keyboard before switching off, to ensure you have backups in case new settings should accidentally overwrite any old ones or, the keyboard is not used for awhile e.g shut down for the night.

Hope this helps!

Audrey