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Lexmark C950 User Manual

Lexmark C950
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Print quality guide
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 printer control panel for a message about a printer supply.
This section provides solutions to print quality problems.
Printer is printing blank pages
Try one or more of the following:
MAKE SURE THERE IS NO PACKING MATERIAL LEFT ON THE TONER CARTRIDGE
Remove the toner cartridge and make sure the packing material is properly removed. Reinstall the toner cartridge.
MAKE SURE THE TONER CARTRIDGE IS NOT LOW ON TONER
When 88.xx [color] cartridge low appears, make sure the toner is distributed evenly within the toner cartridge:
1 Remove the toner cartridge.
2 Firmly shake the cartridge side-to-side and front-to-back several times to redistribute the toner.
3 Reinsert the toner cartridge.
Note: If print quality does not improve, replace the toner cartridge.
If the problem continues, the printer may need to be serviced. For more information, contact Customer Support.
Characters have jagged or uneven edges
If you are using downloaded fonts, verify that the fonts are supported by the printer, the host computer, and the software
program.
Print quality guide
Page 1 of 12

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Lexmark C950 Specifications

General IconGeneral
Print Resolution1200 x 1200 dpi
Duplex PrintingYes
Processor Speed1.2 GHz
ConnectivityEthernet, USB
Print TechnologyLaser
Print Speed50 ppm
Monthly Duty Cycle300000 pages
Recommended Monthly Page Volume5, 000 - 33, 000 pages
Memory1024 MB
Hard DriveOptional
Output Capacity500 sheets
InterfaceUSB 2.0
Media TypePlain paper, Card stock, Labels, Envelopes, Transparencies
Total Media Capacity5140 sheets
Media SizesLetter, Legal, A4, A5, Executive, Folio, Statement
Operating Systems SupportedWindows, Mac, Linux

Summary

Printer is printing blank pages

MAKE SURE THERE IS NO PACKING MATERIAL LEFT ON THE TONER CARTRIDGE

Remove toner cartridge and ensure packing material is removed before reinstalling.

MAKE SURE THE TONER CARTRIDGE IS NOT LOW ON TONER

Redistribute toner by shaking the cartridge when the 'cartridge low' message appears.

Characters have jagged or uneven edges

Clipped images

CHECK THE GUIDES

Adjust width and length guides in the tray to match the paper size.

CHECK THE PAPER SIZE SETTING

Ensure the paper size setting matches the loaded paper in the tray.

Fine horizontal lines appear on color pages

Set Quiet Mode to Off

Set the printer's Quiet Mode to Off (Image/Photo) to resolve fine lines.

Shadow images appear on prints

CHECK THE PAPER TYPE AND WEIGHT SETTINGS

Verify that paper type and weight settings match the loaded paper.

MAKE SURE THE PHOTOCONDUCTOR UNIT IS NOT DEFECTIVE

Replace the photoconductor unit if it is defective.

Gray background

MAKE SURE THE TONER CARTRIDGE IS NOT LOW ON TONER

Redistribute toner by shaking the cartridge if it's low.

CHECK THE TONER DARKNESS SETTING

Adjust toner darkness to a lighter setting via printer menu or properties.

THE TONER CARTRIDGE MAY BE WORN OR DEFECTIVE

Replace the toner cartridge if it is worn or defective.

Incorrect margins

Light colored line, white line, or incorrectly colored line appears on prints

MAKE SURE THERE IS NO DEFECTIVE TONER CARTRIDGE

Replace the toner cartridge if it is defective.

MAKE SURE THE PHOTOCONDUCTOR UNIT IS NOT DEFECTIVE

Replace the photoconductor unit if it is defective.

MAKE SURE THE TRANSFER MODULE IS NOT DEFECTIVE

Replace the transfer module if it is defective.

CLEAN THE PRINTHEAD LENSES

Clean the printhead lenses by following specific steps.

Paper curl

CHECK THE PAPER TYPE AND WEIGHT SETTINGS

Ensure paper type and weight settings match the loaded paper.

LOAD PAPER FROM A FRESH PACKAGE

Use paper from a fresh package and store it properly.

Print irregularities

THE PAPER MAY HAVE ABSORBED MOISTURE DUE TO HIGH HUMIDITY

Use fresh paper and store it in its original wrapper to avoid moisture.

CHECK THE PAPER TYPE SETTING

Verify that the paper type setting matches the loaded paper.

CHECK THE PAPER

Avoid using textured paper with rough finishes.

THE TONER MAY BE LOW

Replace the toner cartridge

Replace the toner cartridge when it is low or print fades.

THE FUSER MAY BE WORN OR DEFECTIVE

Replace the fuser

Replace the fuser if it is worn or defective.

Repeating defects appear on a page

MAKE SURE THE PHOTOCONDUCTOR UNIT IS NOT DEFECTIVE

Replace the photoconductor if defects repeat due to its defectiveness.

MAKE SURE THE FUSER IS NOT DEFECTIVE

Replace the fuser if defects repeat across all colors.

Skewed print

CHECK THE PAPER GUIDES

Adjust paper guides to prevent skewed prints.

CHECK THE PAPER

Use paper that meets printer specifications.

MAKE SURE THE PRINTER IS CLEAN OR IS NOT CONTAMINATED WITH PAPER DUST

Clean the printer's exterior and interior components.

MAKE SURE THE PAPER FEED ROLLERS ARE CLEAN AND ARE NOT CONTAMINATED WITH DUST

Clean the paper feed rollers

Clean the paper feed rollers carefully using a damp lint-free cloth.

Solid color pages

MAKE SURE THE PHOTOCONDUCTOR IS NOT DEFECTIVE AND IS INSTALLED CORRECTLY

Reinstall or replace the photoconductor if solid color pages have issues.

Streaked horizontal lines appear on prints

SELECT ANOTHER TRAY OR FEEDER

MAKE SURE THERE IS NO WORN, DEFECTIVE, OR EMPTY TONER CARTRIDGE

Replace the toner cartridge if it is worn, defective, or empty.

CLEAR THE PAPER PATH AROUND THE TONER CARTRIDGE

Clear any paper or visible toner from the paper path near the toner cartridge.

Streaked vertical lines appear on prints

SELECT ANOTHER TRAY OR FEEDER

Select a different paper tray or feeder source for printing.

MAKE SURE THERE IS NO WORN, DEFECTIVE, OR EMPTY TONER CARTRIDGE

Replace the toner cartridge if it is worn, defective, or empty.

CLEAR THE PAPER PATH AROUND THE TONER CARTRIDGE

Check and clear the paper path around the toner cartridge.

MAKE SURE THERE IS NO TONER IN THE PAPER PATH

Ensure there is no toner present in the paper path.

Print is too dark

CHECK THE DARKNESS, BRIGHTNESS, AND CONTRAST SETTINGS

Adjust darkness, brightness, and contrast settings via printer menu or properties.

LOAD PAPER FROM A FRESH PACKAGE

Use fresh paper and store it properly to prevent moisture absorption.

AVOID TEXTURED PAPER WITH ROUGH FINISHES

Avoid using textured paper with rough finishes.

CHECK THE PAPER TYPE SETTING

Ensure the paper type setting matches the loaded paper.

Print is too light

CHECK THE DARKNESS, BRIGHTNESS, AND CONTRAST SETTINGS

Adjust darkness, brightness, and contrast settings to a higher value.

LOAD PAPER FROM A FRESH PACKAGE

Use fresh paper and store it properly to prevent moisture absorption.

AVOID TEXTURED PAPER WITH ROUGH FINISHES

Avoid using textured paper with rough finishes.

CHECK THE PAPER TYPE SETTING

Ensure the paper type setting matches the loaded paper.

Transparency print quality is poor

CHECK THE TRANSPARENCIES

Use only transparencies that meet the printer specifications.

CHECK THE PAPER TYPE SETTING

Ensure the paper type setting is set to Transparency.

Toner specks

MAKE SURE THERE IS NO DEFECTIVE TONER CARTRIDGE

Replace the toner cartridge if it is defective or worn.

MAKE SURE THE PHOTOCONDUCTOR UNIT IS NOT DEFECTIVE

Replace the photoconductor unit if it is defective.

Toner fog or background shading appears on the page

MAKE SURE THE TONER CARTRIDGE IS INSTALLED CORRECTLY OR IS NOT DEFECTIVE

Reinstall or replace the toner cartridge if it is not installed correctly or is defective.

MAKE SURE THE TRANSFER MODULE IS NOT WORN OR DEFECTIVE

Replace the transfer module if it is worn or defective.

MAKE SURE THE PHOTOCONDUCTOR UNIT IS NOT WORN OR DEFECTIVE

Replace the photoconductor unit if it is worn or defective.

MAKE SURE THE FUSER IS NOT WORN OR DEFECTIVE

Replace the fuser if it is worn or defective.

MAKE SURE THE PRINTER HAS RECALIBRATED RECENTLY

Perform color adjustment from the Quality menu.

MAKE SURE THE APPLICATION HAS NOT SPECIFIED AN OFF-WHITE BACKGROUND

Check application settings for background specifications.

MAKE SURE NO TONER IS IN THE PAPER PATH

Contact customer support if no toner is in the paper path.

Toner rubs off

CHECK THE PAPER TYPE AND WEIGHT SETTINGS

Ensure paper type and weight settings match loaded paper, adjust weight if needed.

CHECK THE PAPER TEXTURE SETTING

Ensure paper texture setting matches loaded paper, adjust if necessary.

MAKE SURE THE FUSER IS NOT WORN OR DEFECTIVE

Replace the fuser if it is worn or defective.

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