Dell 3000cn Color Laser Printer User Manual page 161

3. Hold the toner cartridge and pull out the cartridge.
CAUTION: Do not touch inside the printer with your hands. Some parts may be hot.
4. 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.
5. Lift the tab up 90 degrees and pull the toner seal straight off, keeping it parallel with the toner cartridge.