Brother HL-4040CDN - Manual (Page 121)

Routine Maintenance
112
6
Belt unit
6
Order No. BU-100CL
Change Belt Unit message
6
When the belt unit runs out, the following message appears on the LCD. When you see this message, you
must replace the belt unit:
Change Belt Unit
CAUTION
DO NOT touch the surface of the belt unit. If you touch it, it could degrade print quality.
Damage caused by incorrect handling of the belt unit may void your warranty.
Replacing the belt unit
6
a
Turn off the printer power switch. Press the front cover release button and then open the front cover.
b
Hold the green handle of the drum unit. Lift the drum unit up and then pull it out until it stops.