Install the toner cartridge assembly into the printer by aligning the blue arrows on the guides of thetoner cartridge assembly with the blue arrows on the tracks in the printer and pushing the tonercartridge assembly in as far as it will go.7.After you replace the imaging drum, you should reset the imaging drum's counter. To reset thecounter, press and hold the Cancel button until all lights flash in sequence.8.NOTICE: Resetting the imaging drum's counter without replacing the imaging drum may damageyour printer and void your warranty.Close the front cover.9.Cleaning the Printhead Lens1.