HP DesignJet Z2600 Z5600 PostScript Printer - User guide
If you see horizontal lines in part 1 and also missing dashes in part 2 for the same color, the printhead
responsible needs cleaning. However, if the rectangles look solid, do not worry about just a few missing dashes in
part 2; these are acceptable because the printer can compensate for a few clogged nozzles.
Here is an example of a gray printhead in a good state:
And here is an example of the same printhead in a bad state:
Corrective action
1. Clean any faulty printheads (see Clean the printheads on page 149). Then reprint the Image Diagnostics
Print to see whether the problem has been solved.
2. If the problem remains, clean the printheads again, and reprint the Image Diagnostics Print to see whether
the problem has been solved.
3. If the problem remains, consider cleaning your printheads manually (see Clean the printheads
on page 149). You could also try reprinting your current print job, in case it now prints satisfactorily.
4. If the problem remains, try cleaning the printhead drop detector. The printer normally noties you when
this is necessary, but it may be worth trying even if the printer has not suggested it. See Clean the printhead
drop detector on page 149.
5. If the problem still remains, replace any persistently faulty printheads (see Handling ink cartridges and
printheads on page 99), or contact HP Support (see Contact HP Support on page 164).
ENWW The Image Diagnostics Print 145