HP DesignJet 2500CP Service Manual page 157

PQ Problem:
Printheads Affected:
Problem Description: Small well defined areas of light color, 0.4 inches
Corrective Action:
Print Quality
Missing/ Light Blocks of color in a print
All
tall, with a 4mm half-colored region on either
side.
Solution will be different depending on the type of
problem:
1 Cover opened, or cover sensor not making good
contact. If the user is present, usually a Close
Window to Continue" message will show on the
front panel if this is happening, or the printer's
carriage will be slowing down in the middle of a
printing pass.
Solution Check that covers are all shut.
D
Wiggle covers with printer idle to see if this
triggers any front panel messages. If so, the
cover sensors need adjustment.
2 Intermittent opens/shorts in printhead.
Printhead is shorting, probably due to ink in
the electrical contacts. As the liquid short heats
up, it may dry out and the printhead will start
functioning properly again.
Solution Check printer carriage and
D
printhead electrical contacts for dried ink.
Clean if dirty. If printhead still fails with
clean contacts, replace IDS.
3 Broken trace in carriage trailing cable.
Solution Replace the Trailing Cable or the
D
Carriage Assembly.
HP DesignJet CP Series Printers 6-21