Exceptional software failure.

Reboot the projector.

Retraction motor disconnected.

Check if the wire unit (reference C image "Dolby 3D color wheel board connections.") of the retraction motor is well inserted. Replace wire unit if damaged.

Defect micro switch.

Replace the electronic board of the Dolby 3D color wheel unit.

Mechanical mechanism is blocked. The color wheel can not be moved back and forward by hand. Note that to move the color wheel manually you have to remove the light processor unit from the projector.

Replace the whole Dolby 3D color wheel unit in case you can not unlock the color wheel. Send the blocked unit back to Barco.

Malfunction retraction motor.

Replace the whole Dolby 3D color wheel unit. Send the malfunction unit back to Barco.