Replacement Of Fusing Unit - Brother MFC-9420CN Service Manual

6.4.2 Replacement of Fusing Unit

<Criterion of Replacement>
It is recommended to replace with a new fusing unit according to the periodic maintenance cycle
listed in the
The suggested replacement timing is indicated on the control paned with the following message,
"REPLACE FUSER".
<Purpose of Replacement>
To prevent the decline of fusing strength and print quality due to the deterioration of the fuser
roller.
<Tools and Replacement Materials>
Fusing unit (1 unit): Voltage specification to be confirmed.
WARNING
• Fusing unit and its peripheral parts are very hot.
• Prior to starting the replacement work, leave the machine for approx. ten minutes while the
power supply of the machine is ON. Then, turn it off and check that the unit and parts are well
cooled down.
<Work Procedure>
Sequence of Disassembling
(1) Turn off the machine's power switch. To avoid injury, wait until the machine has cooled
down sufficiently before you replace the fusing unit.
(2) Open the back cover and the scanner unit of the machine.
Table 6-1 to maintain the satisfactory print quality.
Replace Fuser
Fig. 6-9
6 -1 0
Scanner unit
Back cover
Confidential