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HP Designjet 4020 Manual

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General advice
When you have any print quality problem:
●
To achieve the best performance from your printer, use only genuine manufacturer's supplies and
accessories, whose reliability and performance have been thoroughly tested to give trouble-free
performance and best-quality prints. For details of recommended papers, see
Supported paper
types on page 200.
●
Make sure that the paper type selected in the front panel is the same as the paper type loaded
into the printer. To check this, highlight the
or icon on the front panel.
●
Bear in mind that roll paper will generally give better print quality than a single sheet of the same
kind of paper. When you are using single sheets of paper, we strongly recommend that you always
set the print quality to Best.
●
Check that you are using the most appropriate print quality settings for your purposes (see
Choose
print quality settings on page 57). You are most likely to see print quality problems if you have set
the print quality to Fast.
●
To maintain the best print quality at the expense of speed, change the Printhead monitoring
setting to Intensive. See
Manage printhead monitoring on page 97.
●
Check that your environmental conditions (temperature, humidity) are suitable for high-quality
printing. See
Environmental specifications on page 210.
Banding (horizontal lines across the image)
If your printed image suffers from added horizontal lines as shown (the color may vary):
1. Check that you are using appropriate print quality settings. See Choose print quality settings
on page 57.
2. If the problem persists, clean the printheads. See
Recover (clean) the printheads on page 97.
3. Consider changing to a heavier paper type: we recommend HP Heavyweight Coated Paper or HP
Productivity Photo Gloss when printing dense colors.
4. If the problem persists, use the Image Diagnostics Print to find out more about it. See
How do I...
(Image Diagnostics Print topics) on page 117.
150 Chapter 15 The problem is... (print quality topics) ENWW
Print quality problems
… 160 …


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