Lexmark Z31 Color Jetprinter, Service Manual

Page: 26 / 62

2-12
Service Manual
4099
Print Quality Service Check
FRU / Function Action
1 Printhead
Cartridge Be sure the machine contains good print
cartridges.
2 Color Printhead
Cartridge Cross
Contamination Cross contamination of color inks results in
incorrect colors printed, as when green prints for
yellow, (when yellow and blue are mixed in the
printhead cartridge). This problem resolves quickly
as the printhead cartridge is used.
If cross contamination occurs, check the following:
• The maintenance station wiper for damage.
• The printhead nozzle plate was resealed with
tape.
3 Printhead Carrier
Assembly Reseat the printhead cables in the system board
and check the following parts for wear or damage:
• Printhead Cartridge Latch
• Latch Spring
• Carrier
4 System Board
Printhead Carrier
Assembly • Perform the “Test Page” on page 3-1 . Look for
a break in the diagonal line of the nozzle test
pattern. A broken line indicates one or more
print nozzles are not working. Run the test again
to verify the failure. If there are even breaks in
the diagonal line similar to the pattern shown
below, replace the system board.
If there is a single break or random breaks in the
diagonal line, remove the printhead cartridges and
check the gold-plated contacts on the end of the
printhead carrier cable for dirt, wear and damage.
Use only a clean dry cloth to clean the contacts.
If the symptom remains, replace the system board.
5 Maintenance
Station Intermittent nozzle failures can be caused by worn
parts in the maintenance station. Perform the
“Maintenance Station Service Check” on
page 2-7
, and then return to this check.