Cleaning The Drum Unit - Brother HL-3140CW User Manual

Routine Maintenance

Cleaning the drum unit

If your printout has white or black dots at 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 the machine is in Ready mode.
b
Press a or b to choose Machine Info.. Press OK.
c
Press a or b to choose Drum Dot Print. Press OK to print the drum dot check sheet.
d
Press and hold down
e
Open the top cover until it locks in the open position.
f
The colour of printed dots is the colour of the drum you should clean. Take out the toner cartridge and
drum unit assembly of the colour causing the problem.
to turn the machine off.
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