Oki C911dn Troubleshooting Manual page 48

Printing Troubles
Symptom
Stripes or dots appear
1
periodically in horizontal
direction.
Paper feeding direction
2
Portion of white ground is
lightly stained.
Border of characters is blurred. LED head is unclean.
When printing postcards,
envelopes, or coated papers,
printing will be thinly stained
overall.
Rubbing it off will remove the
toner.
Specks appear on glossy
papers.
Cause
In the case of cycle length of
about 125 mm, image drum
may be unclean or there may
be dents on it.
In the case of cycle length of
about 38 mm, there is dirt
inside the image drum.
In the case of cycle length of
about 150 mm, there are dents
on the fuser unit.
Image drum is exposed to light. Return the image drum inside
Dirt has deposited on the paper
transfer path.
Paper has static electricity.
Thick paper is used.
Low toner.
Paper not supported.
Paper is moist.
Printing of envelopes and
coated papers will result in
toner deposit overall.
Type and thickness setting of
paper is inappropriate.
Recycled paper is used.
Type and thickness setting of
paper is inappropriate.
- 48 -
Troubleshooting
Wipe it lightly with a soft tissue
paper.
If there are dents, replace the
image drum.
Open and close the toner
replacement cover, and repeat
the initial operation.
Replace the fuser unit.
the printer, and do not use the
printer for a few hours. If it
does not rectify even after that,
replace the image drum.
Print few pages as test copies.
Use paper stored at appropriate
temperature and humidity.
Use thinner paper.
Replace the toner cartridge.
Wipe it with a soft tissue paper.
Use recommended paper.
Replace with a new paper.
Device has not broken down.
Do not use coated paper to the
extent possible.
Correct [Media Weight] in the
operation panel to appropriate
value. Or, change [Media
Weight] to a thicker value than
the present value.
Correct [Media Weight] in the
operation panel to appropriate
value. Or, change [Media
Weight] to a thicker value than
the present value.
Correct [Media Weight] in the
operation panel to appropriate
value. Or, change [Media
Weight] to a thicker value than
the present value.
Reference
pages
page 57
Basic
page 65
page 57
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Basic
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Basic
page 77
Basic
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Advanced
Advanced
Advanced