Cleaning The Drum Unit - Brother HL-5440D User Manual

Routine Maintenance

Cleaning the drum unit

If your printout has white or black dots at 3.7 in. (94 mm) intervals, the drum may have foreign material, such
as glue from a label stuck on the drum surface. Follow the steps below to solve the problem.
a
Make sure that the front cover is closed and the power cord is plugged in.
b
Turn on the machine and wait until the machine is in Ready mode.
c
Press Go two times. The machine will print the drum dot check sheet.
d
Leave the machine turned on for 10 minutes for the internal fan to cool the extremely hot parts inside the
machine.
e
Turn off the machine's power switch.
f
Press the front cover release button and then open the front cover.
g
Take out the drum unit and toner cartridge assembly.
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