Excessive wobble may indicate a bent disk. Damaged disks should be replaced immediately to prevent possible disk failure. Be sure to store unused disks in their original packaging. Chopper does not respond to speed control. Chopper does not respond to external voltage.
Incorrect frequency is displayed.
Be sure to set the Disk Type selector to correspond with the disk in use. Control unit appears dead when powered on. Check the control unit fuse. If control unit continually blows fuses, call PTI for service. Attempting to service any other control unit components will void the warranty.