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Table 3-49 Image defects table (continued)
Problem Sample Cause Solution
Vertical white lines appear in a
particular color.
The laser beam window is
dirty.
Clean the window and remove any
foreign substances.
Scratches are present on the
circumference of the
developing cylinder or
photosensitive drum.
White scratch down the page
could mean the scanner glass
needs to be cleaned.
Remove the affected print cartridge
and re-install. The PGCs will clean
the glass.
If the problem persists, replace the
affected print cartridge.
The laser/scanner-unit mirror
is dirty.
Replace the laser/scanner assembly.
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.
White scratch down the page
could mean the scanner glass
needs to be cleaned.
Remove the affected print cartridge
and re-install. The PGCs will clean
the glass.
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.
ENWW
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