Solving Print Quality Problems - Lexmark C520 User Manual

Solving print quality problems

Many print quality problems can be solved by replacing a supply or maintenance item that is approaching the end of its
intended life. Check the operator panel for a message about a printer consumable. See Determining the status of
supplies for information about other ways to identify consumables that need to be replaced.
Use the following table to find solutions to print quality problems.
Symptom
Repeating defects
Color misregistration
ABCDE ABCDE
ABCDE
ABCDE
White or colored line
ABCDE
ABCDE
ABCDE
Troubleshooting
Cause
Either the toner cartridges, the
photoconductor units, or the fuser
are defective.
Color has shifted outside of the
appropriate area (top to bottom or
left to right) or has been
superimposed over another color
area.
Either the toner cartridges, the
photoconductor units, or the
transfer belt are defective, or toner
has accumulated in front of the
printhead or on the printhead lens.
Solving print quality problems
Solution
Marks occur repeatedly only in one color and
multiple times on a page:
Replace the item if the defects occur every:
33.5 mm (1.32 in.) or 35.7 mm (1.41 in.) for the toner
cartridges
28.3 mm (1.11 in.) or 72.4 mm (2.85 in.) for the
photoconductor unit
Print the Print Quality Test Pages and the Print defects
guide to look for defects. See Printing the Print
Quality Test Pages for more information. Print the
Print defects guide which is available from the Help
menu on the printer operator panel.
Marks occur down the page repeatedly in all
colors:
Replace the fuser if the defects occur every 116 mm
(4.56 in.).
1 Turn the printer off.
2 Remove and reinstall the photoconductor units.
3 Turn the printer on.
4 Select Color Adjust from the Quality Menu
in Settings.
If the problem still exists, see Aligning the toner
cartridges for color registration for more
information.
Clean any spilled toner in the printer housing near the
printhead using a soft, clean, lint-free cloth.
Clean the printhead lenses. See Cleaning the
printhead lenses.
Replace the color toner cartridge causing the line.
If the problem still exists, replace the photoconductor
units.
If the problem continues, replace the transfer belt.
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