HP 4000

6-21
Print Quality
HP Designjet 4000/4020 Printer Series Service Manual
Lines are Missing or Thinner than Expected
Description of problem
Shown below is an example of what you might see if you have this problem:
Corrective Action
1 Check that the line thickness and color settings are correct in the application
that was used to generate the image.
2 Check that the appropriate print quality settings are being used and reprint
the image.
Refer to Page 6-3 for further information on choosing the correct
Print Quality settings
.
3 Recover the Printheads (Ink Menu/Printheads/Recover Printheads) and
reprint the image.
4 Try using a heavier paper type. When printing dense colors, it is
recommended to use HP Heavyweight Coated Paper or HP Productivity
Gloss.
5 Using Part 3 of the Image Quality Diagnostic Print, check if there is a
significant amount of nozzles out in the color that is actually causing the
problem (if see you a problem with the Black color in the customer print, then
only check the Black printhead in the Image Quality Diagnostic Print). If
there is a significant amount of nozzles out (refer to image 1 on Page 6-19)
then replace the faulty Printhead.