Print Quality Problems - Oki B4400 Series User Manual

P
RINT QUALITY PROBLEMS
Before consulting a service representative regarding a print
quality problem, check the table below to see if there is a
solution, or something you might have overlooked.
SYMPTOM
Blank sheets
printed.
Entire page
prints faintly.
Page has grey
background.
Page prints all
black.
Page has
repetitive
marks.
Oblong area of
faint print
appears on each
page.
Vertical white
streaking or
faint areas on
page.
Vertical black
lines.
B4400/B4600 User's Guide – Troubleshooting > 91
PROBLEM
Image drum
cartridge not
properly installed.
Empty or missing
toner cartridge.
Empty toner
cartridge. Pages
get fainter when
toner is used up.
LED array is dirty.
Static electricity,
generally from dry
environments,
causes toner to
stick to
background.
Hardware problem.
Damaged image
drum cartridge
causes repetitive
marks every 1.6
inches (4.06 cm)
due to surface
nicks and
scratches.
Drop out caused by
using paper
exposed to high
humidity.
Toner is low and
does not distribute
properly, or the
drum is worn out.
LED array is dirty.
Hardware problem.
SOLUTION
Reinstall image drum cartridge.
Install new toner cartridge.
Install new toner cartridge.
Clean LED array.
Change paper to a smoother laser
bond or use a humidifier.
Contact service.
Generate a cleaning page,
repetitive marks may be
temporary.
Change paper stocks, check paper
storage environment or use a
dehumidifier; check toner level.
Replace toner cartridge. Check
drum and replace the drum, if
necessary. Contact service.
Clean LED array.
Contact service.