440 Maintenance
6 Reinsert the removed waste toner box.
NOTE:
• If the waste toner box does not fit into place properly, make sure that the belt unit is fully inserted.
7 Turn the waste toner box lock lever 90-degrees clockwise to lock the waste toner box.
8 Close the side cover.
NOTE:
• After replacing the belt unit, be sure to initialize its life counter. For details, see "Reset Transfer Unit" on page 315.