Dell 1125 Mono Laser MFP - Manual (Page 23)

Cleaning the Interior
Paper, toner, and dust particles can accumulate inside the printer and cause print quality problems, such as smearing or toner specks. Clean inside the printer
to prevent these problems.
1. Power the printer off and unplug the power cord.
2. Open the front cover of the printer.
3. Pull the drum cartridge straight out in the direction of the arrow.
4. The drum cartridge contains the toner cartridge. Set it on a clean flat surface. To prevent damage, do not expose the toner cartridge to light for more
than a few minutes.
5. With a dry and lint-free cloth, wipe away any dust and spilled toner from the drum cartridge area.
CAUTION: Allow a reasonable amount of time for the printer to cool down.
CAUTION: Do not touch the green underside of the toner cartridge. The surface is very delicate and light sensitive. Use the handle on the drum
cartridge to avoid touching this area.