Brother HL-L8350CDWT - Manual (Page 147)

Routine Maintenance
140
5
j Push the drum unit in until it stops.
k
Close the front cover of the machine.
Resetting the belt counter
When you replace the belt unit with a new one, you must reset the belt unit counter by completing the
following steps:
a Press a while holding down Go on the machine's control panel.
b Press a or b ( + or -) to display Belt Unit. Press OK.
c
Press a for Reset to reset the belt unit counter.