Brother HL HL-4050CDN User Manual page 122

d
Hold the green parts of the belt unit with both hands and lift the belt unit up, then pull it out.
e
Unpack the new belt unit, and remove the protective cover and paper.
f
Put the new belt unit in the printer. Match the h mark on the belt unit to the g mark on the printer. Push
down on the green area of the belt unit to lock it in place.
Routine Maintenance
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