Print Quality Problems - Oki B4400 User Manual

NOTE: If the edge of the jammed paper protrudes (or can be
seen) from the exit, reinstall the image drum, close the top
cover and switch the printer on. Remove the jammed paper
from the exit when the exit roller begins rotating after a few
seconds after switching on. However, if the jammed paper
cannot be removed, contact a service representative.

Print 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.
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.
B4400/4500/4550/4600 User's Guide
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.
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