Lexmark 2050 Color Jetprinter Service Manual - Page 23

Print Quality Service Check, Diagnostic Information 2-13

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Print Quality Service Check FRU 1 Print Cartridge 2 Printhead Carrier Assembly 3 System Board Printhead Cable Rubber Backer Action Be sure the printer contains good print cartridges. Reseat the printhead cables in the system board and check the following parts for wear or damage: • Print Cartridge Latch • Latch Spring • Carrier • Perform the 'Test Page' on page 3-5. 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, replace the system board. 4 Maintenance Station 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. 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. Diagnostic Information 2-13

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Diagnostic Information 2-13
Print Quality Service Check
FRU
Action
1
Print Cartridge
Be sure the printer contains good print cartridges.
2
Printhead Carrier
Assembly
Reseat the printhead cables in the system board
and check the following parts for wear or damage:
•
Print Cartridge Latch
•
Latch Spring
•
Carrier
3
System Board
Printhead Cable
Rubber Backer
•
Perform the
’Test Page’ on page 3-5
. 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, 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.
4
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.