Poor Color Alignment; Negative Ghosting Or Faded Image - Lexmark C750 Service Manual

5060-00x

Poor color alignment

Step Action and questions
1 Print cartridge - Make sure that the print cartridges are
properly inserted and are seated properly in their
respective V blocks.
Are the cartridges seated correctly?
2 Front cover and cartridge contact block - Check the
front cover and the cartridge contact block to make
sure that all the springs and cartridge hold downs are
present and correctly installed.
Are all springs and cartridge hold downs present and
correctly installed?
3 ITU - Make sure that the ITU legs are properly seated
onto the rail at the right side of the printer. This is
visible by removing the yellow print cartridge.
Is the ITU seated correctly?
4 Alignment - Enter the Diagnostics Menu. Perform the
alignment for the color required. See
on page

Negative ghosting or faded image

The print has a negative ghost on the page or the image is faded, particular with text. This problem
may happen with any color and can be mistaken as toner smudges on the page.
Step Action and questions
1 Check the bellcranks of the color that is having the
problem.
Is a bellcrank broken or missing?
2 Check each of the springs that attach to the bellcranks
to make sure they are attached and not broken or
missing.
Are the springs for the color having the problem
missing or unattached?
2-144
Service Manual
3-15.
Yes
Go to step 2
Go to step 3
Go to step 4
"ALIGNMENT"
Yes
Replace the broken
or missing
bellcrank.
Repair or replace
the spring as
necessary.
No
Install the
cartridge(s)
correctly
Replace any
missing or
damaged springs
or hold downs
Reinstall the ITU.
If the problem
continues, replace
the "ITU
assembly" on
page 4-46
No
Got to step 2
Look for any signs
of missing or
damaged parts in
the area of the
color having the
problem, including
the ITU.