Dell 5100cn Color Laser Printer User Manual page 200

CAUTION: Never throw used toner cartridges into a fire. The residual toner could explode resulting in
burns and injuries.
Removing the Used Toner Cartridge
NOTE: Remove any print jobs from the outer front cover before removing the top cover.
1. Remove the top cover.
2. Grip the levers at the ends of the toner cartridge that you want to replace and pull them up.
3. Pull out the toner cartridge.
Installing the New Toner Cartridge