Brother DCP-9055CDN Basic User's Manual page 67

j
Make sure the green lock lever (1) is in
the release position as shown in the
illustration.
1
k
Match the guide ends (2) of the drum
unit to the c marks (1) on both sides of
the machine, then gently slide the drum
unit into the machine until it stops at the
green lock lever.
1
2
Routine maintenance
l
Turn the green lock lever (1) clockwise
to the lock position.
m
Push the drum unit in until it stops.
n
Close the front cover of the machine.
1
A
59