5
Routine Maintenance
Replacing supplies
You must replace supplies when the machine indicates that the life of the supply is over. You can replace the
following supplies yourself.
Using non-Brother supplies is not recommended and may affect the print quality, hardware performance, and
machine reliability.
NOTE
The drum unit and toner cartridge are two separate parts.
Toner cartridge
See Replacing the toner cartridges on page 127.
Model Name: TN-900BK, TN-900C, TN-900M, TN-900Y
Belt unit
See Replacing the belt unit on page 140.
Model Name: BU-320CL
Drum unit
See Replacing the drum unit on page 133.
Model Name: DR-321CL
Waste toner box
See Replacing the waste toner box on page 146.
Model Name: WT-320CL
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