Brother 4570CDW - Manual (Page 126)

Routine Maintenance
103
5
c
Turn the green lock lever (1) at the left of the machine counterclockwise to the release position. Holding
the green handles of the drum unit, lift the front of the drum unit and remove it from the machine.
d Hold the handle of the toner cartridge and slightly push it to unlock. Then pull it out of the drum unit.
Repeat this for all the toner cartridges.
e Unpack the new drum unit and remove the protective cover.
1