Oki C942 C911dn/C931dn/C931DP/C941dn/C941DP/C942 Troubleshooting Guide - Engli - Page 52

Print quality is poor

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Troubleshooting Maintenance Index Printing Troubles Print quality is poor 1 Memo zz If the problem is not solved using the following methods, contact your dealer. Symptom Cause Troubleshooting White stripe in perpendicular direction. LED head is unclean. Wipe LED head with a soft tissue paper. Low toner. Replace the toner cartridge. 2 Deposit of foreign substances. Replace the image drum. Paper feeding direction Window film of image drum is unclean. Image drum has not been set correctly. Wipe window film with a soft tissue paper. Please set the image drum correctly. Printing is blurred in perpendicular direction. LED head is unclean. Wipe LED head with a soft tissue paper. Low toner. Replace the toner cartridge. Paper not supported. Use recommended paper. Reference pages page 87 page 64 page 66 - page 66 page 87 page 64 Basic Paper feeding direction Printing is light. The toner cartridge is not installed correctly. Re-install the toner cartridge. Low toner. Replace the toner cartridge. Paper is moist. Use paper stored at appropriate temperature and humidity. Paper not supported. Use recommended paper. Paper not supported. Type and thickness setting of paper is inappropriate. Correct [Media Weight] in the operation panel to the appropriate value. Or, change [Media Weight] to a thicker value than the present value. Recycled paper is used. Correct [Media Weight] in the operation panel to the appropriate value. Or, change [Media Weight] to a thicker value than the present value. Printing is blurred in some Paper contains moisture. Dry it. Use paper stored at appropriate parts. Solid printing will result temperature and humidity. in the appearance of white dots Inappropriate settings of [Paper Change the value of [Printer or lines. Black Setting] or [Paper Color Setting]>[Paper Black Adjust] Setting]. or [Paper Color Setting]. In the case of transparency In the case of transparency settings, [Trans. Black Setting] settings, change the value of or [Trans. Color Setting] is not [Trans. Black Setting] or [Trans. properly set. Color Setting]. If printing is blurred, raise the setting value. If white dots appear, lower the setting value. Stripes in perpendicular direction. There are dents on the image Replace the image drum. drum. Low toner. Replace the toner cartridge. page 64 page 64 Basic Basic Basic Basic Advanced page 66 page 64 Paper feeding direction - 52 -

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52
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Printing Troubles
Troubleshooting
1
2
Index
Maintenance
Print quality is poor
Memo
z
If the problem is not solved using the following methods, contact your dealer.
Symptom
Cause
Troubleshooting
Reference
pages
White stripe in perpendicular
direction.
Paper feeding direction
LED head is unclean.
Wipe LED head with a soft
tissue paper.
page 87
Low toner.
Replace the toner cartridge.
page 64
Deposit of foreign substances.
Replace the image drum.
page 66
Window film of image drum is
unclean.
Wipe window film with a soft
tissue paper.
-
Image drum has not been set
correctly.
Please set the image drum
correctly.
page 66
Printing is blurred in
perpendicular direction.
Paper feeding direction
LED head is unclean.
Wipe LED head with a soft
tissue paper.
page 87
Low toner.
Replace the toner cartridge.
page 64
Paper not supported.
Use recommended paper.
Basic
Printing is light.
The toner cartridge is not
installed correctly.
Re-install the toner cartridge.
page 64
Low toner.
Replace the toner cartridge.
page 64
Paper is moist.
Use paper stored at appropriate
temperature and humidity.
-
Paper not supported.
Use recommended paper.
Basic
Paper not supported.
Type and thickness setting of
paper is inappropriate.
Correct [Media Weight] in
the operation panel to the
appropriate value. Or, change
[Media Weight] to a thicker
value than the present value.
Basic
Recycled paper is used.
Correct [Media Weight] in
the operation panel to the
appropriate value. Or, change
[Media Weight] to a thicker
value than the present value.
Basic
Printing is blurred in some
parts. Solid printing will result
in the appearance of white dots
or lines.
Paper contains moisture. Dry it.
Use paper stored at appropriate
temperature and humidity.
Basic
Inappropriate settings of [Paper
Black Setting] or [Paper Color
Setting].
In the case of transparency
settings, [Trans. Black Setting]
or [Trans. Color Setting] is not
properly set.
Change the value of [Printer
Setting]>[Paper Black Adjust]
or [Paper Color Setting].
In the case of transparency
settings, change the value of
[Trans. Black Setting] or [Trans.
Color Setting].
If printing is blurred, raise the
setting value. If white dots
appear, lower the setting value.
Advanced
Stripes in perpendicular
direction.
Paper feeding direction
There are dents on the image
drum.
Replace the image drum.
page 66
Low toner.
Replace the toner cartridge.
page 64