Brother MFC 9840CDW - Manual (Page 177)

Troubleshooting and routine maintenance
161
C
j
Push the drum unit in until it stops.
k
Close the front cover of the machine.
l
Plug the machine’s power cord back into
the AC power outlet first, and reconnect
all cables and telephone line cord. Turn
on the machine’s power switch.
Cleaning the drum unit
C
If you have the following print quality
problems, clean the drum unit as follows.
a
Press the front cover release button and
then open the front cover.
b
Close the front cover of the machine.
The machine starts warming up, wait
until it finishes warming up before going
on to step c.
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75 mm / 2.95 in.
75 mm / 2.95 in.