Lexmark C912 Service Manual - Page 138

5055-xxx Image quality troubleshooting Print quality problems Problem Action Print is too light, or printed images or characters have voids or dropouts. Be sure you're using recommended paper or other media. Use media from a new package. Be sure you have selected the correct Paper Weight setting for the media you're using. Be sure the affected print unit is completely installed in the printer. Set print darkness to 4 from the Color Menu. Clean the printhead LEDs. If you suspect a toner cartridge is low on toner, remove the appropriate toner cartridge and gently shake it back and forth to distribute the toner evenly. Reinsert the print unit and try printing the job again. Replace the affected toner cartridge. Replace the photodevelopers. If only black print appears light, replace just the black photodeveloper. If one of the colors prints too light, replace all three of the color photodevelopers. If there is still a problem, go to "Uneven printing" on page 2-97. 2-88 Service Manual