Lexmark E250DN - Govt Laser 30PPM Special Build Mono Taa Service Manual page 74

4512-220, -230
Solving print quality problems
Note: Refer to the print defects guide at the end of the manual for repeating defects.
Print quality problems
Problem
Light or blurred
characters.
Toner smudges
appear on the front or
back of the page.
Vertical or horizontal
streaks appear on the
page.
2-50
Lexmark™ E250d and E250dn
Cause/action
Light print
See "Light print" on page
The toner cartridge may be getting low on toner:
• Remove the toner cartridge and toner cartridge assembly.
• Shake it from side to side to redistribute the toner.
• Reinstall it and recheck for condition.
• Make sure to use the recommended print media (see media types and sizes in the
User's Reference).
• Use MarkVision™ to define the custom type setting for media type, media texture, or
media weight.
• The toner cartridge or PC Kit may be defective. Replace the PC Kit first and recheck.
Blurred characters
Blurred images, including characters, are usually caused by a defective printhead.
Vertical white lines
See "Vertical streaks" below.
Vertical white lines may be caused by the laser beam, which may be partially blocked. With
the printer off, clear the path or clean the lens. The toner cartridge or fuser may be defective.
Try a different toner cartridge. Inspect the fuser at its entry for debris.
• Make sure the media is straight and unwrinkled.
• Replace the PC Kit, and recheck before replacing the toner cartridge. See
back of page" on page 2-49
Vertical streaks
Something could be caught between the PC kit and the fuser. Check the paper path around
the fuser entry. Try a different toner cartridge.
Vertical white lines may be caused by the laser beam, which may be partially blocked. With
the printer off, clear the path or clean the lens. The toner cartridge or fuser may be defective.
Try a different toner cartridge. Inspect the fuser at its entry for debris.
Horizontal streaks
The toner cartridge or the fuser may be the cause due to excessive page count or defect.
Replace as needed.
If the lines are parallel and match the two intended ghost images, the Form Type may be
incorrectly set. Check those settings.
The PC cleaner sump may be full. Replace the PC kit.
2-49.
for more information.
"Toner on