Fusing Unit Replacement - Brother HL-3450CN Service Manual

4.2

Fusing Unit Replacement

Criterion of Replacement
The fusing unit should be replaced with a new one according to the periodical maintenance
cycle set out in Table 6-4.
When the time is due for replacement of the fusing unit, the following message appears on
the control panel.
Purpose of Replacement
To prevent the print quality from declining due to the deterioration of the fixing unit's fuser
rollers.
The fusing unit and its surrounding area are very hot. Make sure prior to starting the
replacement work that the fusing unit and its surrounding area are well cooled down,
otherwise you may get burned.
Necessary Tools and Replacement Materials
N
Two or three pieces of cotton cloth for cleaning
N
Fusing unit (one unit)
Work Procedure
Sequence of Disassembling
(1) After turning off the printer, unplug the power cable from the power outlet.
(2) Open the top cover.
(3) Remove the two screws securing the
fusing unit. (Fig.6-14)
(4) Holding the handles at both ends of
the fusing unit and remove the fusing
unit from the printer. (Fig.6-15)
(5) Remove the oil bottle and the fuser
cleaner.
REPLACE FUSER
WARNING
Screw
6-23
HL-3450CN SERVICE MANUAL
Fig. 6-15
Fusing unit
Fig. 6-16
Screw