Lexmark 642, 644, 640 manual Solving print quality problems, Problem Action

Troubleshooting

Solving print quality problems

The information in the following table may help you solve print quality problems. If these suggestions still do not correct the problem, call for service. You may have a printer part that requires adjustment or replacement.

Problem	Action
Print is too light.	• The toner may be low. To utilize the remaining toner, remove the cartridge by gripping
	the handles with both hands. With the cartridge arrows pointing downward, firmly
	shake the print cartridge side-to-side and front-to-back several times to redistribute the
	toner. Reinstall the cartridge and then press	. Repeat this procedure multiple times
	until the print remains faded. When the print remains faded replace the print cartridge.

•Change the Toner Darkness setting in the Quality menu.

•Change the Brightness setting in the Quality menu.

•Change the Contrast setting in the Quality menu.

•If you are printing on an uneven print surface, change the Paper Weight and Paper Texture settings in the Paper menu.

•Verify the correct print media is being used.

Toner smears or print comes	• If you are printing on an uneven print surface, change the Paper Weight and Paper
off the page.	Texture settings in the Paper menu.
	• Verify the print media is within the printer specifications. See Understanding paper
	and specialty media guidelines for more details.
	If the problem continues, contact the Lexmark Customer Support Center at
	1-800-Lexmark (1-800-539-6275) or http://support.lexmark.com.

Toner appears on the back of	Toner is on the transfer roll. To help prevent this, do not load print media that is smaller
the printed page.	than the page size of the job to be printed.
	Open and close the printer top front cover to run the printer setup cycle and clean the
	transfer roll.
Toner fog or background	• Check the print cartridge to make sure it is installed correctly.
shading appears on the page.	• Replace the print cartridge.

Solving print quality problems

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