My lanier is making dark copies - Lanier 5222/27 Laser Printer

One of the most common reasons for a Lanier 5222 or 5227 to make dark copies is a problem with the drum unit or developer. Fortunately on those machines, the drum unit and developer are all self-contained in one easily-replacable unit, called the PCU (photoconductor).

If you don't have a new PCU handy, you can order one from the same company you get your toner from. The PCU should generally be replaced every 60,000 copies, but sometimes it may need to be replaced sooner (especially if you run a lot of dark copies or make a lot of copies of images) and it can often run longer than 60,000.

Replacing the PCU is easy -- it sits right next to the toner bottle, and all you have to do is slide the old PCU out and slide the new PCU in (once you remove all of the tape and other trappings from it). Instructions will be included in the box with the new PCU.

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