Print Quality Is Poor - Oki C911dn Troubleshooting Manual

Print quality is poor

Memo
z If the problem is not solved using the following methods, contact your designated help desk.
Symptom
White stripe in perpendicular
direction.
Paper feeding direction
Printing is blurred in
perpendicular direction.
Paper feeding direction
Printing is light.
Printing is blurred in some
parts. Solid printing will result
in the appearance of white dots
or lines.
Stripes in perpendicular
direction.
Paper feeding direction
Cause
LED head is unclean.
Low toner.
Deposit of foreign substances.
Window film of image drum is
unclean.
Image drum has not been set
correctly.
LED head is unclean.
Low toner.
Paper not supported.
The toner cartridge is not
installed correctly.
Low toner.
Paper is moist.
Paper not supported.
Paper not supported.
Type and thickness setting of
paper is inappropriate.
Recycled paper is used.
Paper contains moisture. Dry it. Use paper stored at appropriate
Inappropriate settings of [Paper
Black Setting] or [Paper Color
Setting].
There are dents on the image
drum.
Low toner.
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Troubleshooting
Wipe LED head with a soft
tissue paper.
Replace the toner cartridge.
Replace the image drum.
Wipe window film with a soft
tissue paper.
Please set the image drum
correctly.
Wipe LED head with a soft
tissue paper.
Replace the toner cartridge.
Use recommended paper.
Re-install the toner cartridge.
Replace the toner cartridge.
Use paper stored at appropriate
temperature and humidity.
Use recommended paper.
Correct [Media Weight] in
the operation panel to the
appropriate value. Or, change
[Media Weight] to a thicker
value than the present value.
Correct [Media Weight] in
the operation panel to the
appropriate value. Or, change
[Media Weight] to a thicker
value than the present value.
temperature and humidity.
Change the value of [Printer
Setting]>[Paper Black Adjust]
or [Paper Color Setting].
Replace the image drum.
Replace the toner cartridge.
Printing Troubles
1
Reference
pages
page 77
page 55
page 57
2
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page 57
page 77
page 55
Basic
page 55
page 55
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Basic
Advanced
Advanced
Basic
Advanced
page 57
page 55