Oki C9800 GA User Manual page 99

SYMPTOMS
Printing is light.
Partially faded
images. White
spots and lines
appear in solid
printing.
Vertical lines
appear.
Horizontal Lines
and spots appear
periodically.
POSSIBLE CAUSES
The toner cartridge is
not properly seated.
The toner is low.
The paper is moist.
The paper is not
suitable for the printer.
Thickness and type of
paper are inappropriate.
Recycled paper is being
used.
Paper is moist or dry.
The image drum
cartridge is damaged.
The toner is low.
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.
C9800 User's Guide> 99
STEPS TO TAKE
Reinstall the toner
cartridge.
Replace the toner cartridge.
Use paper stored in proper
temperature and humidity
conditions.
Use recommended paper.
Set a proper value for
[Media Weight] and [Media
Type] in the menu setup, or
set one value thicker for
[Media Weight].
Set one value thicker for
[Media Weight] in the menu
setup.
Use paper stored in proper
temperature and humidity
conditions.
Replace the image drum
cartridge.
Replace the toner cartridge.
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.