Lexmark 3000 Color Jetprinter, Service Manual

Page: 25 / 66

Diagnostic Information 2-13
4 System Board
Printhead Cable
Rubber Backer • Run the ’Test Page’ on page 3-4. Look for a
break in the diagonal line of the 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, ensure
the printhead cables are connected properly. If
the symptom remains, replace the system
board.
If there is a single break or random breaks in the
diagonal line, check the following:
• Check the gold-plated contacts, on the end of
the cable that connect to the carrier, for dirt and
wear. Use only a clean dry cloth to clean the
contacts. Also check the cable for damage. You
may need to remove the cable from the carrier
to inspect it.
• A worn rubber backer results in poor contact
between the printhead cable and the print
cartridge. Check the rubber backer for wear.
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,
then return to this check.
6 Paper Feed Ink smudging and smearing can be caused by
paper problems or problems in the paper feed
area.
Check the following:
• Correct type of paper is being used. Also check
the paper for curl or wrinkles.
• Feed rollers for wear, dirt, or looseness.
• Gears for wear or binds.
• Paper path for obstructions.
FRU / Function Action