Oce CS 5050 User Manual page 34

In the example above, the prime test shows that there are three electrically
defective jets and one clogged jet. The header indicates that you can
compensate for the electrically defective jets in the 4-pass mode. But you
must clear the clogged jet manually. See 'clearing clogged jets' on page 93
for further information.
If all jets appear to be defective, reinstall the cartridges.
Note:
34 Océ CS 5050/5070 User Manual