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USER’S GUIDE
7-18
Question Recommendation
Black spots appears on the
printed paper at 94mm
intervals.
Fi
g
. 7-17 Black Spots
If toner remains stuck on the drum, wipe it off gently
with a cotton swab. Replace the drum unit if the drum
is scratched or deteriorated.
Clean the drum unit as follows;
1. Place a printed page in front of the process unit,
and find the exact position of the image defect.
Fi
g
. 7-18
2. Turn the drum gear by hand while looking at the
surface of the drum until you find the cause of the
problem.
Fi
g
. 7-19
3. Wipe the surface of the photosensitive drum with
a cotton swab until the dust or paper on the
surface of the drum comes off.
Fi
g
. 7-20
Do not wipe the surface of the photosensitive drum
with something sharp. (ball-point pen etc.)
✒ Note
The drum unit is a consumable, and it is necessary to replace it
periodically.
94mm interval
position of smudge o
on the drum