About Drum Unit
When it is time to replace a Drum Unit, a message appears to prompt you to contact your service representative. If the message appears, contact your service representative.
Tips
The settings by the service representative are required to display a message about Drum Unit. By the factory default status, this message is displayed only in some area. For details, contact your service representative.
Reference
Replacing a Drum Unit ( [Replacing a Drum Unit] )