3-5
Ink Supplies Troubleshooting
HP Designjet 4000/4020 Printer Series Service Manual
Priming the Ink System
When the customer first receives the printer, it is supplied with a set of four
Setup Printheads pre-installed in the Carriage Assembly. These Setup
Printheads are used for the priming of the tubes in the modular ink delivery
system. The customer must not remove the Setup Printheads from the
Carriage without following the procedures in the Setup Guide.
When the Printer is powered ON for the first time, the Printer will
automatically perform the priming process. Without the priming process, the
customer will NOT be able to use the Printer.
Why does the Printer require priming:
The Tubes System is empty when the customer receives the Printer.
The Tubes System has to be pressurized and filled with ink, ejecting any
air bubbles.
If the Printing Printheads are installed in the carriage during
the priming process, they will be rejected and the front panel
will show a warning message.
When Should You Replace the Ink Supplies?
When to change the ink supplies is mostly determined by you with guidance
from the front panel. In conjunction with the messages displayed in the front
panel and the message explanations in this chapter, you will be able to
choose for yourself when is the right time to change the ink supplies.
The Printer will also display the ink level and will tell you when the ink supply
is low on ink. This means you have constantly updated information about the
ink supplies.
Printhead life is anticipated to be 1000ml or twelve months in the printer,
whichever occurs first, provided that the printhead is used under normal
operating conditions (using HP Ink Cartridges only) and its “install before
date” has not lapsed. However results vary depending on the print quality
setting being used.
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