HP DesignJet 2500CP Service Manual page 156

PQ Problem:
Printheads Affected:
Problem Description: Small (usually 1 3 mm) dots of color showing up in
Cause of Problem:
Corrective Action:
PQ Problem:
Printheads Affected:
Problem Description: Light spots in imaged media matching up to
Cause of Problem:
Corrective Action:
6-20
Color spots in print
All
unexpected places on the print. Dots often show more
strike through on coated paper than normal printing.
Fiber on printhead directly over some nozzles is
catching ink drops, then dripping onto print.
Usually the problem goes away when the
printheads are wiped at the end of the print. If it
persists, a printhead check or printhead recovery
will give it another try. If a user is having a lot of
problems with drips, it may be related to paper
dust from their media, or to a dusty environment
they are printing in.
Ghost image at top of page, first plot after pause
Imaging Inks
mechanical features inside the printer (bail,
pinch arm assemblies).
Equilibration rate differences between media and
environment in areas that are protected" by parts
of the printer.
Advance a little bit of media before the first print
of the day. Move Media" option in the front panel
is an easy way to do this.
HP DesignJet CP Series Printers Image Quality