Oce ColorWave 900, User Manual

Page: 266 / 320

Lines with missing colors followed by a large spot
Introduction
When the printed output shows lines with missing colors followed by a large spot, a droplet of
ink blocks a number of printhead nozzles on the nozzle surface (see
Parts of the printhead on
page 227 ). The droplet increases until it falls off the printhead onto the media, causing a large
spot.
The cause of this problem can be inadequate printhead maintenance, or the presence of paper
fibers that block the printhead nozzles.
Step Action
1 Stop printing for 30 seconds. Before the next print job starts, the system automatically
cleans the printheads.
2 Check whether the problem is resolved by printing a suitable test print. If the problem
persists, perform the 'Maintain printheads' procedure on the printhead that shows the
problem (see
Maintain printheads on page 191
and select [Level 2]).
3 Check whether the problem is resolved by printing a suitable test print. If the problem
persists, perform the 'Maintain printheads' procedure on the printhead that shows the
problem (see
Maintain printheads on page 191
and select [Level 3]).
4
Lines with missing colors followed by a large spot
266 Chapter 10 - Troubleshooting