Image quality problems, Image, Quality problems – HP DesignJet 500 User Manual
Page 74: Image quality, Problems

Image Quality Problems
Before attempting the diagnostic procedures contained
in this section to solve any print quality problems, it is
important to first check that the printer is correctly
setup to print what you want. Many problems
concerned with print quality can be solved by
correcting the way the printer is configured.
If you have image quality problems the first place you
should go is to check the configuration setup.
The Image Quality Print is a diagnostic print designed
to highlight for you the root cause of your image quality
problems. Follow the procedures step-by-step.
This section helps you to solve color problems you may
have with the printer. More help on this subject is
available from the HP web site which you can access
Recovering the printhead(s) means that the
printer automatically cleans and tests the
printhead(s).
This procedure details how to re-calibrate your printer
for the media you are using. This should not normally be
necessary, however if your working under significantly
different environmental conditions, use this procedure.
The printhead alignment selection causes the printer to
align the printheads immediately. If you are having
image quality problems and you suspect the root cause
to be the printhead(s), use this procedure.
Color calibration improves color consistency between
prints, and from one printer to another.