BK: Black
C: Cyan
M: Magenta
Y: Yellow
Make sure the green lock lever (1) is in the release position, as shown in the illustration.9.
Gently slide the drum unit into the machine until it stops at the green lock lever.10.
Turn the green lock lever clockwise to the lock position.11.
Make sure you put the toner cartridge in correctly or it may separate from the drum unit.
Replace the Drum Unit | Brother http://support.brother.com/g/b/faqendbranchprintable.aspx?c=us&lang=...
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