HP Designjet 4000 HP Designjet 4000 Printer Series - Quick Reference Guide - Page 119

Horizontal bands across strips of one color only, Corrective action - banding

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How do I use the Image Diagnostics Print? or as a more gradual wave effect: Horizontal bands across strips of one color only If a printhead is faulty, you will see horizontal bands across strips of one color only; or at least the horizontal bands will be much more noticeable in one color than in the others. Note Banding in the green strips is more difficult to see; and it may be caused by a yellow printhead or by a cyan printhead. If you see banding only in the green strip, it is caused by a yellow printhead; if you see banding in the green and cyan strips, it is caused by a cyan printhead. Corrective action 1. Check that you are using appropriate print quality settings. See "How do I choose print quality settings?" on page 68. 2. Clean the printheads. See "How do I recover (clean) the printheads?" on page 51. 3. Reprint the Image Diagnostics Print. If you still see banding, continue with steps 4 and 5. 4. As there are two printheads for each color, check exactly which printhead is responsible for the problem, using Part 3 of the Image Diagnostics Print. See "Part 3" on page 118. 5. Replace the printhead that shows the problem. See "How do I remove a printhead?" on page 44 and "How do I insert a printhead?" on page 48. 117

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or as a more gradual wave effect:
Horizontal bands across strips of one color only
If a printhead is faulty, you will see horizontal bands across strips of one color only; or
at least the horizontal bands will be much more noticeable in one color than in the
others.
Note
Banding in the green strips is more difficult to see; and it may be caused
by a yellow printhead or by a cyan printhead. If you see banding only in the
green strip, it is caused by a yellow printhead; if you see banding in the green
and cyan strips, it is caused by a cyan printhead.
Corrective action
1.
Check that you are using appropriate print quality settings. See “How do I choose
print quality settings?” on page 68.
2.
Clean the printheads. See “How do I recover (clean) the printheads?” on page 51.
3.
Reprint the Image Diagnostics Print. If you still see banding, continue with steps 4
and 5.
4.
As there are two printheads for each color, check exactly which printhead is
responsible for the problem, using Part 3 of the Image Diagnostics Print. See
“Part 3” on page 118.
5.
Replace the printhead that shows the problem. See “How do I remove a
printhead?” on page 44 and “How do I insert a printhead?” on page 48.
117
How do I use the Image
Diagnostics Print?