Cleaning The Drum Unit - Brother HL-4140CN User Manual

Routine Maintenance

Cleaning the drum unit

If your printout has coloured spots at 94 mm (3.7 in.) 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 the machine is in the ready state.
b
Press + or - to choose Machine Info.. Press OK.
c
Press + or - to choose Drum Dot Print. Press OK to print out the drum dot check sheet.
d
Turn off the machine's power switch. Disconnect all interface cables, and then unplug the AC power
cord.
e
Press the front cover release button and then open the front cover.
f
Hold the green handle of the drum unit. Pull the drum unit out until it stops.
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