HP Designjet 4000 Printer series - Manual (Page 115)

8. Now replace the printhead cleaners for any printheads that have been changed.
See “How do I remove a printhead cleaner?” on page 120 and “How do I insert a
printhead cleaner?” on page 122.
Caution Leaving the old printhead cleaner in the printer will shorten the
new printhead's life and possibly damage the printer.
How do I 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 Configuration menu > 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
Configuration menu > Printhead monitoring > Optimized.
How do I 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 Printheads > Recover
printheads. Cleaning takes about two to four minutes.
How do I 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.
113
How do
I
handle
the
ink
system?