Brother MFC-9840CDW Printer User Manual


 
Troubleshooting and routine maintenance
159
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 print quality problems, clean the
drum unit as follows.
a Turn off the machine’s power switch.
Unplug the telephone line cord first,
disconnect all cables, and then unplug
the power cord from the AC power
outlet.
b Press the front cover release button and
then open the front cover.