Lexmark 780dn - C Color Laser Printer User Manual

Print quality guide
Page 2 of 4
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.
Print the repetitive defects guide to
determine what 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’s 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.
Print too light
• Paper settings may be incorrect.
• The Toner Darkness setting is too
light.
• You are using paper that does not
meet the printer specifications.
• The print cartridges are low on toner.
• The print cartridges are defective or
have been installed in more than one
printer.
• Make sure the printer’s paper type,
paper texture, and paper weight
settings match the type of paper you
are using.
• Select a different Toner Darkness
setting from the printer driver before
sending the job to print.
• Perform a Color Adjust in the
Settings/Quality Menu.
• Load paper from a new package.
• Avoid textured paper with rough
finishes.
• Make sure the paper you load in the
trays is not damp.
• Shake the specified print cartridge to
utilize the remaining toner.
• Replace the specified print cartridge.
Print too dark
• The Toner Darkness setting is too
dark.
• The print cartridges are defective.
• Select a different Toner Darkness
setting from the printer driver before
sending the job to print.
• Perform Color Adjust.
• Replace the specified print cartridge.
Symptom Cause Solution
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Lexmark 780dn - C Color Laser Printer Specifications

General

Brand	Lexmark
Model	780dn - C Color Laser Printer
Category	All in One Printer
Language	English