HP Designjet 4500 Printer series - Manual (Page 275)

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.
3. If the problem persists, clean the printheads. See Recover (clean) the printheads.
4. If the problem persists, use the Image Diagnostics Print to find out more about it. See How do
I... (Image Diagnostics Print topics).
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
ENWW Lines are missing or thinner than expected 261
The problem is... (print
quality topics)