Possible Causes - Oki pro920TW User Manual

SYMPTOMS
Vertical lines
appear.
Horizontal Lines
and spots appear
periodically.
Unprinted spots
appear in the area
about 30mm from
the top edge of the
paper.
White area of paper
is lightly stained.
Periphery of the
letters is smudged.

POSSIBLE CAUSES

The image drum
cartridge is damaged.
The toner is low.
The toner is sticking to
the fuser unit.
When the interval is
about 94mm (4in), the
image drum (the green
tube) is damaged or
dirty.
When the interval is
about 42mm (1.5in),
there may be foreign
particles in the image
drum cartridge.
When the interval is
about 87mm (3.5in),
the fuser unit is
damaged.
The image drum
cartridge has been
exposed to light.
Paper being used is too
inelastic.
Paper contains static.
Too thick paper is used.
The toner is low.
The toner is sticking to
the fuser unit roller.
The LED head is dirty.
pro920WT User's Guide> 144
STEPS TO TAKE
Replace the image drum
cartridge.
Replace the toner cartridge.
Replace the fuser cover
sheet.
Wipe it lightly with a soft
cloth. Replace the image
drum cartridge when it is
damaged.
Open/close the top cover,
and print again.
Replace the fuser unit.
Replace the image drum
cartridge if the problem is
not resolved.
Enter a blank space on the
first 30mm of the paper,
and print again.
Use paper stored in proper
temperature and humidity
conditions.
Use thinner paper.
Replace the toner cartridge.
Set 5 sheets of Letter paper
on the MP tray horizontally,
and execute Print
Information > Demo Page >
CleaningPage from the
display panel.
Wipe the head with LED lens
cleaner or with a soft cloth.