Xerox WorkCentre 7228 Quick Use Manual page 31

Replacing the Toner Cartridges
7. Install the toner cartridge by aligning the arrows on the
cartridge with unlock symbol on the printer. Make sure the
cartridge is fully installed then turn the cartridge clockwise to
the locked position.
8. Close the Front Door. If the door will not close completely,
make sure the cartridge is in the lock position and the toner
cartridge is installed into the appropriate toner location.
That completes the procedure for replacing the toner
cartridge.
WorkCentre 7228/7235/7245 Quick Use Guide
WorkCentre 7228/7235/7245