Lexmark C77X, Service Manual

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Service Manual
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Streaked horizontal lines The print cartridges, the
transfer roller, image
transfer unit, or fuser may
be defective, empty, or
worn. Replace the print cartridge, the transfer roller, the
image transfer unit, or fuser as needed.
From the printers operator panel, print the repetitive
defects guide to determine which component needs
to be replaced.
Streaked vertical lines • Toner is smeared
before fusing to the
paper.
• The print cartridge is
defective.
• If paper is stiff, try feeding from another tray.
• Replace the color print cartridge causing the
streaks.
Print irregularities • Paper has absorbed
moisture due to high
humidity.
• You are using paper
that does not meet the
printer specifications.
• The image transfer unit
and transfer roller are
worn or defective.
• The fuser is worn or
defective.
• Load paper from a fresh package in the paper
tray.
• Avoid textured paper with rough finishes.
• Make sure the printer paper type, paper texture,
and paper weight settings match the type of
paper you are using.
• Replace the image transfer unit and transfer
roller.
• Replace the fuser.
Quality troubleshooting (continued)
Symptom Cause Solution
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