Brother HL 4150CDN - Manual (Page 143)

Routine Maintenance
137
5
m
Turn the green lock lever (1) clockwise to the lock position.
n Push the drum unit in until it stops.
o
Close the front cover of the machine.
p
Put the Styrofoam piece (1) into the carton. Then put the waste toner box in the Styrofoam piece.
1
1