Lexmark C91 Series, Service Manual

Page: 141 / 493

Diagnostic information
2-91
5055-xxx
Toner smears or rubs off the
page. Be sure you’re using recommended
paper or media.
Be sure you have selected the correct
Paper Weight setting for the media you’re
using.
Be sure the top cover is completely
closed and both sides are snapped shut.
You may need to replace the fuser.
Color fades with fuzzy, poorly
defined edges. Print out a Menu Setting page and check
the level of supplies. If a toner cartridge
shows 10% or less, shaking the cartridge
may improve the printout.
Remove the cartridges and
photodevelopers from the printer. Use a
lint-free, dry cloth to clean the LED’s of
any stray toner. Wipe one at a time and
proceed from the front of the printer to the
back in one gentle swipe. It may take
more than one pass. Use a different spot
on the cloth or a new cloth for each LED.
Reinstall supplies and test.
Remove the supplies from the printer.
Check the LEDs are free to move
upward. With the supplies out, the metal
post is visible on the LED. Push up on the
post and make sure it returns to its
previous position. If the LED is binding, it
is possible there is an incorrect screw
holding the cover in place. If too long a
screw is installed in the cover it will bind
against the LED. The correct screw
length is 3.5 mm. Install the screws and
test.
Debris in the contact blocks may cause
fading. Make sure there is nothing in the
contact block to keep it from seating
securely when the top cover is closed.
Problem Action