10. Use the numbered markers next to the drum roller to find the mark on the drum. For example, a dot in column
2 on the check sheet means that there is a mark in drum region “2”.
11. Turn the edge of the drum unit toward you while looking at the drum surface to find the mark.
IMPORTANT
• To avoid print quality problems, DO NOT touch the surface of the drum unit, only the wheel on the
end.
12. Wipe the surface of the drum gently with a dry cotton swab until the mark or foreign material on the surface
comes off.
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