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
92
l Turn the green lock lever (1) clockwise to the lock position.
1
m Push the drum unit in until it stops.
n Close the front cover of the machine.