Brother MFC-9450CDN User Manual page 158

k
Insert the original orange packing
material for locking the belt unit as
shown in the illustration.
l
Put a piece of paper (letter or A4) on the
belt unit to prevent damage to the belt
unit.
144
m
Put the drum unit back in the machine as
follows.
1
Make sure that the gray lock
lever (1) is in the up position and
put the drum unit in the machine.
Push down the gray lock lever (1).
1
1