Dell B5465dnf Mono Laser Printer MFP - Manual (Page 241)

3 Lift the blue handle, and then pull out the imaging unit from the printer.
4 Unpack the new imaging unit, and then shake it.
5 Remove all packing material from the imaging unit.
Warning—Potential Damage: Do not expose the imaging unit to direct light for more than 10 minutes.
Extended exposure to light may cause print quality problems.
Warning—Potential Damage: Do not touch the photoconductor drum. Doing so may affect the print quality of
future print jobs.
Maintaining the printer 241