Dell 5110cn - Color Laser Printer User Manual page 320

NOTE: Use a soft cloth, such as cotton for cleaning.
NOTE: Make sure nothing touches or scratches the surface of the light-sensitive drum (green-colored
roller) or the transfer roller (black-colored roller).
8. Replace the imaging drum. Holding the imaging drum by the handle with the flat part facing the back
of the printer, align the plastic guides on both sides of the imaging drum with the slots in front of the
arrows on the printer.
9. Close the top cover.
10. Close the front cover.