Holding the grips, attach the toner unit to the guide rails.
Secure the toner unit with the two screws.
Push the toner until back into the machine.
Open the front cover.
Secure the toner unit with the two screws, and then close the front cover.
Pull out the drawer until it stops.
Secure the toner unit with the screw.
Reattach the cover of the cleaning unit for intermediate transfer belt, and then secure it with the screw.
Engage the drawer cover with the guide rails.
Secure the drawer cover with the screw, and then push the drawer catch up.
Secure the drawer cover with the two screws.
Secure the drawer cover with the three screws.
Secure the drawer cover with the screw.
Push the drawer back into the machine.