HP Designjet T1200 Printer series - Manual (Page 169)

First look at the upper part of the print (part 1). Each colored rectangle should be a uniform color
without any horizontal lines across it.
Then look at the bottom part of the print (part 2). For each individual colored pattern, check that most
of the dashes are present.
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 165 ). 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 165 ). You could also try reprinting your current print job, in case it now prints
satisfactorily.
ENWW The Image Diagnostics Print 161
Print-q
u
ality issu
es