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Routine Maintenance
147
4
Cleaning the drum unit
4
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 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
to turn the machine off.
e
Open the top cover until it locks in the open position.
f
The color of printed dots is the color of the drum you should clean. Take out the toner cartridge and drum
unit assembly of the color causing the problem.