HP Designjet L25500 Printer Series - Maintenance and troubleshooting guide (second edition)

These messages mean that some components are nearing the end of their lives. You can continue printing for
quite some time, depending on your use of the printer. However, HP strongly recommends that you call your
service representative and arrange for a service maintenance visit. The service engineer can then replace the
worn parts on-site, which will prolong the life of the printer.
The benefits of arranging a service engineer's visit when these messages appear on the front panel are two-
fold:
●
The printer components can be replaced at a time that is convenient for you, and so will not disturb your
daily workflow.
●
During a service maintenance visit, the service engineer replaces several parts at once. This eliminates
the need for repeat visits.
Use the printhead status plot
The printhead status plot consists of patterns that are designed to highlight printhead-reliability problems. It
helps you to check the performance of the printheads that are currently installed in your printer, and to
determine whether any printhead is experiencing clogging or other problems.
Print the printhead status plot
To print the printhead status plot:
1. Use the same substrate type that you were using when you detected a problem.
2. Check that the selected substrate type is the same as the substrate type that is loaded into the printer.
3.
On the printer's front panel, select the
icon, then select Image quality maintenance > Print all test
plots.
It takes about 2 minutes to print the printhead status plot.
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 37. 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 the User's guide.
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:
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