Dell 3100cn Owner's Manual page 41

To remove the used drum cartridge, push up the lever on the right side of the printer.
2.
Grab the drum cartridge by the handle, and pull it up and out.
3.
CAUTION:
Do not touch inside the printer with your hands. Some parts may be hot. Allow time for the
printer to cool before attempting to remove parts in this area.
41
Maintenance