Lexmark Z51 User Manual page 50

The printer feeds a sheet of paper and prints a nozzle test
pattern, similar to the one shown:
Broken
lines
indicate
clogged
nozzles.
Unbroken
lines
indicate the
nozzles
were
cleaned.
3
Examine the test pattern.
4
Compare the diagonal line above the printed bars to the
diagonal line below the printed bars.
Look for a break in the diagonal lines. A broken line indicates
clogged nozzles.
If the bottom line still has breaks, run the test two more times.
If the print quality is satisfactory after running the test three
times, the print nozzles are clean. You do not need to complete
the remaining steps.
If the print quality of both lines is not satisfactory after
running the test three times, go to step 5.
5
Remove and reinstall the print cartridge.
6
Repeat the nozzle test.
7
If the lines are still broken, wipe the print cartridge nozzles.
For help, see "Wiping print nozzles and contacts" on page 47.
46
Chapter 5