Dell 3100cn Color Laser Printer - Manual (Page 156)

Installing the New Toner Cartridge
1. Make sure the color of the toner cartridge matches the slot on the toner cartridge carrier. Gently shake the cartridge to distribute the toner evenly.
2. Lift the tab up 90 degrees and pull the toner seal straight off, keeping it parallel with the toner cartridge.
3. To insert the toner cartridge, align the arrows on the cartridge with the corresponding arrows on the printer. Guide the cartridge in until it snaps into
place, and then push down the handhold to lock the cartridge in place.
4. If replacing just one toner cartridge, close the front door and you are finished.
CAUTION: Do not touch inside the printer with your hands. Some parts may be hot.
NOTE: Make sure the toner cartridge is installed correctly. Otherwise, the front door cannot close firmly.