User's Manual

Ink Supplies Troubleshooting
3-12
HP DesignJets 500, 510 and 800 Series Printers Service Manual
Also the % indicates the percentage over the expected life of the
Printhead BUT a Printhead may last more than 100%.
 Whether the Printhead Alignment has been performed since the
last Printhead replacement.
 Whether Color Calibration has been performed since the last
Printhead replacement.
 Whether a Paper Jam was ever detected while this particular
Printhead was installed.