Brother MFC-9420CN Service Manual page 187

(3) To release the fusing unit from the machine, release the lock levers that are on both sides of
the fusing unit.
Lock lever
(4) Hold the handles on both sides as you take the fusing unit out of the machine.
Sequence of Assembling
(1) Put the new fusing unit into the machine. Be sure to insert the fusing unit completely into
the machine.
Fig. 6-10
Fig. 6-11
Fig. 6-12
6 -1 1
Lock lever
Fusing unit
Fusing unit
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