HP Designjet L28500 HP Designjet L28500 Printer Series - User's guide - Page 133

Interpret the printhead status plot, Corrective action, What to do if problems persist, Graininess

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Interpret the printhead status plot The print consists of small dashes, one for each nozzle on each printhead. For each individual colored pattern, make sure that most of the dashes are present. Corrective action 1. Clean any faulty printheads. See Clean the printheads on page 146. Then reprint the printhead status plot to see whether the problem has been solved. 2. If the problem persists, clean the printheads again, and reprint the printhead status plot to see whether the problem has been solved. 3. If the problem continues to persist, replace any persistently faulty printheads. See Replace a printhead on page 113. What to do if problems persist If you still experience print-quality problems after applying the advice in this chapter, here are some additional tips to consider: ● Try selecting a higher print-quality option in your RIP software, either by increasing the number of passes or by reducing the carriage speed. ● Check that your printer firmware is up to date. See Firmware update on page 86. ● Check that you have the correct settings in your software program. ● Call your service representative. See When you need help on page 157. Graininess ENWW Graininess 127

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Interpret the printhead status plot
The print consists of small dashes, one for each nozzle on each printhead.
For each individual colored pattern, make sure that most of the dashes are present.
Corrective action
1.
Clean any faulty printheads. See
Clean the printheads
on page
146
. Then reprint the printhead
status plot to see whether the problem has been solved.
2.
If the problem persists, clean the printheads again, and reprint the printhead status plot to see
whether the problem has been solved.
3.
If the problem continues to persist, replace any persistently faulty printheads. See
Replace a
printhead
on page
113
.
What to do if problems persist
If you still experience print-quality problems after applying the advice in this chapter, here are some
additional tips to consider:
●
Try selecting a higher print-quality option in your RIP software, either by increasing the number of
passes or by reducing the carriage speed.
●
Check that your printer firmware is up to date. See
Firmware update
on page
86
.
●
Check that you have the correct settings in your software program.
●
Call your service representative. See
When you need help
on page
157
.
Graininess
ENWW
Graininess
127