Manage printhead monitoring, Recover (clean) the printheads, Clean a printhead's electrical connections – HP Designjet 4520 Printer series User Manual
Page 107
7.
The front panel display confirms that all printheads are correctly inserted.
8.
Now replace the printhead cleaners for any printheads that have been changed. See
Insert a printhead cleaner on page 103
CAUTION:
Leaving the old printhead cleaner in the printer will shorten the new printhead's life
and possibly damage the printer.
Manage printhead monitoring
The printer automatically checks the status of the printheads from time to time in order to monitor their
health and detect any problems that might affect print quality. The frequency of these checks is optimized
to maintain good throughput.
If you want to increase the frequency of printhead monitoring in order to detect any problems sooner,
select the
icon, then Printer configuration > Printhead monitoring > Intensive. When the printer
is printing and printhead monitoring is set to Intensive, the front panel and the Embedded Web Server
printer status line will display the following message: Printing. Printhead monitoring (instead of just
Printing).
NOTE:
When Intensive is selected, the throughput of the printer will be reduced because of the
increased frequency of printhead checks.
To return to the default printhead monitoring frequency, select the
icon, then Printer
configuration > Printhead monitoring > Optimized.
Recover (clean) the printheads
To clean the printheads (which often enables them to recover from problems), go to the printer's front
panel and select the
icon, then Printhead management > Recover printheads. Cleaning takes
about two to four minutes.
Clean a printhead's electrical connections
In some extreme cases it is possible that the printer will not recognize a printhead after it has been
installed. This is due to the build-up of ink deposits on the electrical connections between the printhead
and the printhead carriage. Under these circumstances you are recommended to clean the printhead's
electrical connections. Routine cleaning of the connections when there are no apparent problems is not
recommended.
Included with your printer (in the Maintenance Kit box) is a carriage interconnect wiper.
ENWW
Manage printhead monitoring
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