Brother HL-7050N - Manual (Page 160)

ROUTINE MAINTENANCE 5 - 11
HL7050_US_UG_FM5.5
Replacing Maintenance Parts
You will need to replace the maintenance parts regularly to maintain
print quality. When it is time to replace these parts, the following
messages will appear on the LCD.
See Maintenance Messages in this chapter.
See Maintenance Messages in this chapter.
See Maintenance Messages in this chapter.
REPLACE PF KIT
REPLACE FUSER
REPLACE LASER