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6-22 Image Quality
HP DesignJet CP Series Printers
PQ Problem: Missing/ Light Blocks of color in a print
Printheads Affected: All
Problem Description: Small well defined areas of light color, 0.4 inches
tall, with a 4mm half–colored region on either
side.
Corrective Action: 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.
D Solution - Check that covers are all shut.
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.
D Solution - Check printer carriage and
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.
D Solution - Replace the Trailing Cable or the
Carriage Assembly.