HP Designjet 4020 and 4520 Printer Series - User's Guide: English

Lines are missing or thinner than expected
1. Check that the line thickness and color settings are correct in your application.
2. Check that you are using appropriate print quality settings. See
Choose print quality settings
on page 57.
3. If the problem persists, clean the printheads. See
Recover (clean) the printheads on page 97.
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.
Solid bands or lines printed over the image
This kind of problem can show itself in several different ways, illustrated below in magenta:
1. A thick colored band
2. Thinner colored bands
3. Discontinuous colored blocks
4. Thin lines
In each case the recommended procedure is as follows:
1. Clean the electrical connections of the printhead that seems to be responsible (in this example,
the magenta printhead). See
Clean a printhead's electrical connections on page 97.
2. Clean the printheads. See
Recover (clean) the printheads on page 97.
ENWW Lines are missing or thinner than expected 151
Print quality problems