From time to time all printers need to have their imaging drums replaced for maintenance and proper operation. This guide will use the Brother HL 5150D as an example but many of the Brother printers will follow the same set of instructions. First, unplug the device to ensure that no accidental prints are started as you are working on the device; this also eliminates the chance of being shocked. Release the cover on the front of the printer to gain access to the internal consumables. The imaging drum will be located inside with the toners; the drum can be changed with or without the toners. The assemblies are all independent of each other.

Gently pull the drum out of the Brother laser printer being careful to not spill the toner. It is recommended that you have an old newspaper or some paper towels around the printer to catch any loose toner that may fallout. Place the imaging assembly on some paper towels as well for the very same reason. At this time take a small lint free cloth and wipe the interior of the access panel and the parts inside. This helps to maintain a clean working environment inside the device as the small toner particles can act as an abrasive and deteriorate the components over time.

Pay close attention to the electrodes on either side of the printer; take special care not to touch these as a static shock could damage them entirely. You may elect to discharge any static electricity by touching a metal surface prior to removing the imaging drum and after. Along the side of the imaging unit you will find clasps that hold in the toner cartridges. Release these and place the cartridge on some paper towels. Take the imaging drum and enclose it in a bag to prevent spillage and dispose of it accordingly. Now take the new imaging unit out of its packaging and insert the toner cartridge. Reverse these steps and you have finished.