Brother HL-L9200CDWT - Manual (Page 175)

Routine Maintenance
168
5
q
Gently slide the drum unit into the machine until it stops at the blue lock lever.
r
Turn the blue lock lever (1) clockwise to the lock position.
s
Push the drum unit in until it stops.
t Close the front cover of the machine.
u Turn on the power switch.
2
2
1