Hp Designjet 4000 Printer series User Manual download pdf (Page 237)

Tell me about printheads

In order to increase printing speed, two printheads are connected to each ink

cartridge, giving eight printheads in total.

The printheads are extremely durable and do not need to be replaced every time an

ink cartridge is replaced. They will continue giving excellent results even if the ink

cartridges are low in ink.

To maintain optimum print quality, the printheads are automatically tested at regular

intervals, and automatically serviced if necessary. This takes a little time and will

occasionally delay printing.

When a printhead eventually needs to be replaced, the front panel identifies the

printhead with a cross in place of the printhead number:

Caution Whenever you buy a new printhead, you get a new printhead

cleaner with it. When you replace a printhead, always replace the printhead

cleaner at the same time. Leaving the old printhead cleaner in the printer will

shorten the new printhead's life and possibly damage the printer.

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Tell me about the ink system

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Hp Designjet 4000 Printer series User Manual Page 237