Oki C910 User Manual page 84

Symptoms
Horizontal
Lines and spots
appear
periodically.
White area of
paper is lightly
stained.
Periphery of
the letters is
smudged.
Toner comes
off when it is
rubbed.
Glossiness is
not uniform.
Possible causes
When the interval is
about 94mm (4in), the
image drum (the green
tube) is damaged or
dirty.
When the interval is
about 42mm (1.5in),
there may be foreign
particles in the image
drum cartridge.
When the interval is
about 87mm (3.5in), the
fuser unit is damaged.
The image drum
cartridge has been
exposed to light.
Paper contains static.
Too thick paper is used.
The toner is low.
The LED head is dirty.
The thickness and type
of the paper are
incorrectly set.
Recycled paper is used.
The thickness and type
of the paper are
incorrectly set.
84
– C910 Troubleshooting
Steps to take
Wipe it lightly with a soft
cloth. Replace the image
drum cartridge when it is
damaged.
Open/close the top cover,
and print again.
Replace the fuser unit.
Replace the image drum
cartridge if the problem is
not resolved.
Use paper stored in proper
temperature and humidity
conditions.
Use thinner paper.
Replace the toner cartridge.
Wipe the head with LED lens
cleaner or with a soft cloth.
Set the correct value of
[Media Type] and [Media
Weight] in the menu setup
or set one value thicker for
[Media Weight].
Set one value thicker for
[Media Weight] in the menu
setup.
Set the correct value of
[Media Type] and [Media
Weight] in the menu setup
or set one value lighter for
[Media Weight].