Lexmark C77x Service Manual page 150

C77/c78 series
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5061
Quality troubleshooting (continued)
Symptom
Gray background
ABCDE
ABCDE
ABCDE
Uneven print density
ABCDE
ABCDE
ABCDE
Ghost Images
Clipped images
(Some of the print is cut
off on the sides, top, or
bottom of the paper.)
Incorrect margins
Skewed print
(Print is inappropriately
slanted.)
2-108
Service Manual
Cause
• The Toner Darkness
setting is too dark.
• The print cartridges are
defective.
• The print cartridges are
defective.
• The transfer roller is
worn or defective.
• The image transfer unit
is worn or defective.
Toner level is low in the
print cartridges.
Guides in the selected tray
are set for a different size
paper than what is loaded
in the tray.
• Guides in the selected
tray are set for a
different size paper than
what is loaded in the
tray.
• Auto size sensing is set
to off, but you loaded a
different size paper in a
tray. For example, you
inserted A4 size paper
into the selected tray
but did not set the
media size to A4.
• Guides in the selected
tray are not in the
correct position for the
media size loaded in the
tray.
• You are using paper
that does not meet the
printer specifications.
Solution
• Select a different Toner Darkness setting from
the printer driver before sending the job to print.
• Replace the print cartridges.
• Replace the print cartridges.
• Replace the transfer roller.
• Replace the image transfer unit.
Replace the print cartridges.
Move the guides in the tray to the proper positions
for the size loaded.
• Move the guides in the tray to the proper
positions for the size loaded.
• Set the Paper Size to match the media in the
tray.
• Move the guides in the tray to the proper
positions for the size loaded.
• Refer to the Card Stock & Label Guide available
on the Lexmark Web site at www.lexmark.com
for detailed specifications.
• For more information, see
on page
1-17.
"Media guidelines"

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