Brother Copier/Printer MFC-9970CDW - Manual (Page 109)

Routine maintenance
93
A
c
Hold the green handle of the drum unit.
Pull the drum unit out until it stops.
d
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.
1