Brother HL-5240 - Manual (Page 79)

6. Routine Maintenance
71
e Unpack the new drum unit.
CAUTION
Wait to unpack a drum unit until immediately before you put it in the printer. Exposure to direct sunlight or
room light may damage the drum unit.
f Put the toner cartridge firmly into the new drum unit until you hear it lock into place. If you put the cartridge
in properly, the blue lock lever will lift automatically.
CAUTION
Make sure that you put in the toner cartridge properly, or it may separate from the drum unit.
g Put the drum unit and toner cartridge assembly back in the printer.
h
Close the front cover.
i
Make sure that the Drum LED is now off.