Xerox 785 - Manual (Page 331)

WorkCentre Pro 665/685/765/785 B-41
4. Separate the Drum Unit from the Developer Assembly. The
following figure shows the Drum Unit and the Developer
Assembly.
5. Place the Drum Unit on a level surface. Cover the Drum Unit with
a clean cloth to protect the unit from exposure to light.
Drum Unit
Developer 098
Assembly