Lexmark C920 Reference Manual page 23

Symptom
Light colored
line, white line,
ABCDE
or wrong colored
line
ABCDE
Streaked
horizontal lines
ABCDE
ABCDE
ABCDE
Streaked vertical
lines
ABCDE
ABCDE
ABCDE
Print irregularities
ABCDE
ABCDE
ABCDE
Cause
The LEDs are dirty.
A toner cartridge, a photodeveloper, the
transfer belt, or fuser may be defective,
empty, or worn.
• Toner is smeared before fusing to the
paper.
• The toner cartridge is defective.
• Paper has absorbed moisture due to
high humidity.
• You are using paper that does not
meet the printer specifications.
• A photodeveloper, the transfer belt or
the fuser is worn or defective.
Print quality guide
Page 2 of 7
Solution
See "Cleaning the LEDs" on page 6.
Replace the cartridge, photodeveloper
(black alone or all other colors at once),
transfer belt, or fuser as needed.
• If paper is stiff, try feeding from
another tray.
• Replace the color cartridge causing
the streaks.
• Load paper from a fresh package in
the paper tray.
• Avoid textured paper with rough
finishes.
• Make sure the printer's paper type,
paper texture, and paper weight
settings match the type of paper you
are using.
• Replace photodeveloper (black
alone or all other colors at once), the
transfer belt or the fuser.