repeating defects are not appearing, print the Print Quality Test Pages.

Printing the print defects guide

1Touch the help icon (?).

2Touch Print Defects Guide.

Printing the print quality test pages

3Turn the MFP off.

4Hold down the number 2 and number 6 keys on the numeric pad.

5Continue to hold the buttons, and turn the MFP on.

Hold the buttons for about 10 seconds while the MFP is powering up, then release the buttons. The MFP enters the Configuration menu.

6Touch Print Quality Pages.

7Touch Exit Configuration Menu.

The printer restarts and returns to the home page.

Solving print quality problems

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. 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.

•Verify you are using the correct printer drivers.

•Verify the environment is Class B.

Toner smears or print comes off the page

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

•Verify the print media is within the printer specifications. See the User’s Guide for more details.

Toner appears on the back of the printed page

Toner is on the transfer roll. To help prevent this, do not load print media that is smaller 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 shading appears on the page

•Check the print cartridge to make sure it is installed correctly.

•The Toner Darkness setting may be too dark. Change the Toner Darkness setting in the Quality Menu.

•Verify the environment is Class B.

•Replace the charge rolls.

•Replace the print cartridge.

Entire page is white

•Make sure the packaging material is removed from the print cartridge.

•Check the print cartridge to be sure it is installed correctly.

•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. Repeat this procedure multiple times until the print remains faded. When the print remains faded, replace the print cartridge.

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Lexmark X642 manual Solving print quality problems
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X642 specifications

The Lexmark X642 is a versatile monochrome laser multifunction printer designed for businesses that require efficient printing, scanning, copying, and faxing capabilities in a compact design. This model is particularly renowned for its reliability and high-performance output, making it a valuable asset for any office environment.

One of the standout features of the Lexmark X642 is its impressive print speed. It can produce up to 40 pages per minute (ppm), ensuring that large print jobs are completed swiftly. This is coupled with a first-page-out time as fast as 6.5 seconds, which significantly reduces waiting times. The printer supports a resolution of up to 1200 x 1200 dots per inch (dpi), resulting in sharp and clear text, along with detailed graphics.

The X642 is equipped with various connectivity options to meet the demands of modern workplaces. It includes USB, Ethernet, and an optional wireless interface, allowing users to connect multiple devices seamlessly. Additionally, it supports various operating systems, making it versatile for different IT environments.

Another excellent aspect of the Lexmark X642 is its scanning capabilities. It features a flatbed scanner and an automatic document feeder (ADF) that can handle up to 50 sheets. This allows users to scan multiple pages quickly, enhancing productivity. The scanning resolution is commendable, with an optical resolution of up to 600 x 600 dpi, making it suitable for detailed documents.

In terms of energy efficiency, the X642 incorporates energy-saving technologies, such as Energy Star certification, which helps reduce overall power consumption. This is beneficial not only for the environment but also for reducing operating costs.

Durability and longevity are essential characteristics of the X642. It is designed to handle high-volume tasks, with a monthly duty cycle capable of reaching 75,000 pages. This robustness makes it ideal for busy offices that demand a reliable printer that can withstand extensive use.

Lastly, the Lexmark X642 is equipped with advanced security features. It includes support for secure printing and document management, ensuring that sensitive information is protected throughout the printing process. Overall, the Lexmark X642 encapsulates a blend of speed, versatility, and security, making it a solid choice for organizations looking to enhance their productivity while maintaining high-quality output.
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