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6-24 Image Quality
HP DesignJet CP Series Printers
PQ Problem: Printer Not Detecting Out Of Ink Properly
Printheads Affected: All
Problem Description: 1 - Printer fails to stop printing when Printheads
out of ink, wasting media, possibly for several
plots. 2 - Printer reports out of ink as Printhead
Failure message.
Cause of Problem: Out of Ink is determined when the following
conditions are true:
1 Ink Level indicator shows low AND
2 Six or more nozzles are missing in a Printhead
Check OR
3 The temperature of the printhead rises to 15
degrees above its normal operating
temperature.
If the ink level indicator is not showing low, (2) or
(3) will result in a Printhead Failure message.
Corrective Action: The Printhead Check usually does a more reliable
job of checking for Out of Ink conditions. Setting the
printhead check to more frequent use will reduce the
amount of wasted media and ink. This is especially
recommended if the printer is being used
unattended. The printhead check does take about a
minute and a half to perform, and uses a thin strip
of media.