Oki C831n User Manual page 108

Other Issues
Symptom
Toner comes off when it
is rubbed.
3
Glossiness is not
uniform.
Color of the printed
image is not what you
expect.
Solid printing of CMY
100% is too light.
Dots appear.
Smears is printed.
Point to check
The settings of media type and
weight are incorrect.
The paper is recycled.
The media weight setting is
unsuitable.
The settings of media type and
weight are incorrect.
The toner is low.
The setting of [Black Finish] is
not suitable for the application.
The color adjustment has been
modified.
The color balance is out of
adjustment.
Color registration is out of
alignment.
[CMY100% Density] is set to
[Disable].
The paper is unsuitable.
When the interval of the dots
is about 94 mm (4 inches), the
image drum (the green tube) is
damaged or dirty.
The paper is moist.
The paper is unsuitable.
Remedy
Press the <ENTER> button
and select [Menus] > [Tray
Configuration] > the paper
tray configuration you are using,
and then select the proper
values for [Media Type] and
[Media Weight]. Or, select a
heavier weight in [Media Weight].
Press the <ENTER> button
and select [Menus] > [Tray
Configuration] > the paper tray
configuration you are using, and
then select a heavier weight for
[Media Weight].
Press the <ENTER> button
and select [Menus] > [Tray
Configuration] > the paper
tray configuration you are using,
and then select the proper
values for [Media Type] and
[Media Weight]. Or, select a
heavier weight in [Media Weight].
Replace the toner cartridge.
On the printer driver, select
[Composite Black (CMYK)]
of [True Black (K)] for [Black
Finish].
Do color matching from the printer
driver.
Press the <ENTER> button and
select [Calibration], and then
[Adjust Density].
Open and close the top cover.
Or, press the <ENTER> button
and select [Calibration], and then
[Adjust Registration].
Press the <ENTER> button
and select [Admin Setup] >
[Color Setup] > [CMY100%
Density], and then select
[Enable].
Use supported paper.
Lightly wipe the image drum with a
soft tissue paper.
Replace the image drum when it is
damaged.
Replace it with new paper.
Use supported paper.
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Reference
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