Open the front door.
Remove the used toner cartridge.
Unpack the new toner cartridge.
Shake the toner cartridge to redistribute the toner.
Insert the new toner cartridge.
Remove the waste toner transfer unit.
Note: To avoid spilling the toner, place the unit in an upright position.
Remove the printhead wiper, and then clean the printhead lenses.
Put the printhead wiper back into place.
Insert the waste toner transfer unit until it clicks into place, and then lock it.
Close the door.