Lexmark C925 Manual 

Many print quality problems can be solved by replacing a supply or maintenance item approaching the end of its intended life. Check the printer control panel for a message about a printer supply. Isolating print quality problems Print the print quality test pages to help isolate print quality problems. 1 Turn the printer off. 2 Load letter- or A4-size paper in the tray or feeder. 3 Hold down and 6 MNO while turning the printer on. 4 Release the buttons when the screen with the progress bar appears. The printer performs a power-on sequence, and then the Configuration menu appears. 5 Touch Print Quality Pages > Print Quality Pages. The print quality test pages print. 6 Touch Back > Exit Config Menu. 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. Print quality guide Page 1 of 13

If you are using downloaded fonts, verify that the fonts are supported by the printer, the host computer, and the software program. Colors not aligned properly ABCDE ABCDE ABCDE ABCDE Color has shifted outside of the appropriate area or has been superimposed over another color area. Try one or more of the following: PERFORM COLOR ADJUST From the printer control panel Quality menu, perform Color Adjust. REINSTALL THE TONER CARTRIDGE Remove and reinstall the toner cartridge. ADJUST THE COLOR ALIGNMENT 1 Turn the printer off. 2 Load letter- or A4-size paper in the tray. 3 Hold down and 6 MNO while turning the printer on. 4 Release the buttons when the screen with the progress bar appears. The printer performs a power-on sequence, and then the Configuration menu appears. 5 Touch Color Alignment > Color Alignment. The color alignment pages print. 6 Touch Color Alignment. 7 On the printed alignment pages, find the straightest of the 20 lines beside the letter A. Print quality guide Page 2 of 13

9 Repeat steps 9 and 10 to align sets B through L. 10 Touch Back > Exit Config Menu. Note: If necessary, adjust the color alignment again. Clipped images Try one or more of the following: CHECK THE GUIDES Move the width and length guides in the tray to the correct positions for the paper size loaded. CHECK THE PAPER SIZE SETTING Make sure the paper size setting matches the paper loaded in the tray: 1 From the printer control panel Paper menu, check the Paper Size setting. 2 Before sending the job to print, specify the correct size setting: • For Windows users, specify the size from Print Properties. • For Macintosh users, specify the size from the Page Setup dialog. Fine horizontal lines appear on color pages You may notice fine, horizontal lines in photographs or pages with a high concentration of color. This can occur when the printer is in Quiet Mode. To fix this, set Quiet Mode to Off (Image/Photo). Shadow images appear on prints ABCDE ABCDE ABCDE ABCDE ABCDE ABCDE CHECK THE PAPER TYPE AND WEIGHT SETTINGS Make sure the paper type and weight settings match the paper loaded in the tray: 1 From the printer control panel Paper menu, check the Paper Type and Paper Weight settings. 2 Before sending the job to print, specify the correct type setting: • For Windows users, specify the type from Print Properties. • For Macintosh users, specify the type from the Print dialog. Print quality guide Page 3 of 13

Replace the imaging unit. 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. Warning—Potential Damage: Be careful not to touch the photoconductor drum. Doing so may affect the print quality of future print jobs. 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. Gray background ABCDE ABCDE ABCDE CHECK THE TONER DARKNESS SETTING Select a lighter Toner Darkness setting: • From the printer control panel Quality menu, change the setting. • For Windows users, change the setting from Print Properties. • For Macintosh users, change the setting from the Print dialog. THE TONER CARTRIDGE MAY BE WORN OR DEFECTIVE Replace the toner cartridge. Incorrect margins ABC DEF ABC DEF Print quality guide Page 4 of 13

CHECK THE PAPER GUIDES Move the guides in the tray to the correct positions for the paper size loaded. CHECK THE PAPER SIZE SETTING Make sure the paper size setting matches the paper loaded in the tray: 1 From the printer control panel Paper menu, check the Paper Size setting. 2 Before sending the job to print, specify the correct size setting: • For Windows users, specify the size from Print Properties. • For Macintosh users, specify the size from the Page Setup dialog. Light colored line, white line, or incorrectly colored line appears on prints ABCDE ABCDE ABCDE ABCDE ABCDE Try one or more of the following: MAKE SURE THERE IS NO DEFECTIVE TONER CARTRIDGE Replace the defective toner cartridge. MAKE SURE THE IMAGING UNIT IS NOT DEFECTIVE Replace the defective imaging unit. MAKE SURE THE TRANSFER MODULE IS NOT DEFECTIVE Replace the transfer module. CLEAN THE PRINTHEAD LENSES Remove and reinstall the imaging unit. The LED wipe at the end of the imaging unit will rub across the row of LEDs, thus cleaning the printhead lenses. Print quality guide Page 5 of 13