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Problem Sample Cause Solution
Vertical white lines appear in all
colors.
Horizontal scratches on the
fuser roller.
Replace the fuser.
Scratches are present on the
circumference of the ITB.
Replace the affected print cartridge.
Replace the ITB.
Horizontal lines appear on the
page.
Repetitive horizontal lines
appear.
Use the repetitive defects ruler to
identify the dirty roller. Clean the
roller. If the roller cannot be
cleaned, replace the fuser.
Horizontal scratches are
present on the photosensitive
drum.
Replace the print cartridge of the
color that matches the defect.
Horizontal scratches are
present on the fuser roller.
Replace the fuser.
A horizontal white line appears
on the page.
Repetitive horizontal white
lines appear.
Use the repetitive defects ruler to
identify the dirty roller. Clean the
roller. If the roller cannot be
cleaned, replace the roller.
Horizontal scratches are
present on the photosensitive
drum.
Replace the print cartridge of the
color that matches the defect.
Scratches are present on the
circumference of the ITB.
Replace the ITB.
Image in a particular color does
not print in the correct color.
Poor contact exists in the
primary charging bias or
developing bias contacts
between the print cartridge
and the product.
Clean each contact of the color that
produces the missing color. If the
problem remains after cleaning,
check the contacts for damage.
Replace any deformed or damaged
parts.
The print cartridge (primary
charging roller, developing
roller, or photosensitive drum)
is defective.
Replace the print cartridge of the
color that matches the defect.
The imaging high-voltage
power-supply is defective (no
primary charging bias or
developing bias output).
Replace the imaging high-voltage
power-supply.
The laser/scanner unit is
defective.
Replace the laser/scanner assembly.
ENWW
Solve image-quality problems
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