Oki B4250 User Manual page 75

Symptom
Vertical white
streaking or faint
areas on page.
Vertical black lines.
Fuzzy print.
Distorted print.
Faded print.
Smeared or blotched
print.
Printed page is light/
blurred.
Bold characters and
dark lines are
smeared.
Print is darker than
usual.
Pages curl
excessively.
Problem
Toner is low and does
not distribute properly,
or the drum is worn out.
LED array is dirty.
Hardware problem.
LED array is dirty.
Paper path, lamp
assembly, or fusing unit
problem.
Toner cartridge is not
correctly installed.
Toner low.
Dirty rollers; toner
dropped inside printer
or image drum problem.
Is toner low?
Is paper meant for laser
printers?
LED array is dirty.
Toner is low.
Darkness setting is too
high.
Printing on wrong side
of paper.
Moisture in paper.
Improper storage.
High humidity.
TROUBLESHOOTING > 75
Solution
Replace toner cartridge. Check drum and
replace the drum, if necessary. Contact
service.
Clean LED array.
Contact service.
Clean LED array.
Generate cleaning page.
Contact service.
Install toner cartridge correctly.
Replace toner cartridge.
Replace image drum and toner.
Contact service.
Replace toner cartridge.
Use recommended paper.
Clean LED array.
Install new toner cartridge.
Change darkness setting.
Turn paper over in tray. (Note arrow on
paper package). Install paper print side
down in tray.
Avoid storing paper in areas of excessive
temperature and humidity. Store paper in
protective wrapping.
Recommended operating humidity: 20-
80%