Lexmark 4227-X00 - Manual (Page 31)

2-8 Service Manual
4227-X00
Print Quality Problems
Symptom Action
No print, but carrier
moves as if printing. Be sure the printhead cables are not loose or
damaged.
Be sure the interface cable is connected properly.
Check the ribbon cartridge for binds or damage.
Go to the “Print Wire Drive Failure Service
Check” on page 2-28 .
Print density is light. If the ribbon has reached its end of life or is worn,
the ribbon cartridge needs to be replaced.
Go to the “Auto Gap Service Check” on page
2-10 . If no problem is found, go to the “Ribbon
Drive Service Check” on page 2-30 .
Uneven print density
across the print line.
Specific dots
missing.
Be sure the printhead cables are connected
correctly to the printhead and the sub logic board.
Clean the printhead.
Set the Auto Gap to On in the user menus and run
the print test. If the print is light at one edge and
uniformly gets darker across the page to the other
edge, perform the
“Printhead-to-Platen Gap
Adjustment” on page 4-2 .
Go to the “Print Wire Drive Failure Service
Check” on page 2-28 .
Scattered ink
smearing, blurred
characters.
Fuzzy print.
Clean the printhead nose.
Clean the ribbon guide and shield.
If the ribbon has reached its end of life or is worn,
the ribbon cartridge needs to be replaced.
Go to the “Print Quality Service Check” on
page 2-27 .