Can a disc be left in the disc tray when moving the audio system?
When moving the main unit.
Do not move the main unit with disc on the disc tray. Remove all discs before moving the main unit. If you move the main unit with discs, the disc may fall off from the disc tray into the main unit and cause a malfunction.
If a disc has fallen into the main unit, contact an authorized service facility to have the disc removed.