Dell 3000cn Color Laser Printer User Manual page 158

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.
4. Remove the protective sheet from the drum cartridge.
CAUTION: Do not touch the drum at the bottom of the drum cartridge.
5. To insert the drum cartridge, push up the lever on the right side of the printer. With the lever in the upright position,
hold the drum cartridge by the handle, align the arrows on the drum cartridge with the corresponding arrows on the
printer and guide the cartridge in until it snaps into place.