HP DesignJet Z6600 Using Your Printer - Page 82

Corrective action, Then reprint the Image Diagnostics

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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 174). 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 174). 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 notifies 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 69. 5. If the problem still remains, replace any persistently faulty printheads (see Handle the ink system on page 55), or contact HP Support (see HP Customer Care on page 185). 74 Chapter 5 Handle the ink system ENWW

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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
174
). 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
174
). 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 notiļ¬es 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
69
.
5.
If the problem still remains, replace any persistently faulty printheads (see
Handle the ink system
on page
55
), or contact HP Support (see
HP Customer Care
on page
185
).
74
Chapter 5
Handle the ink system
ENWW