Konica Minolta HP PageWide XL 4000 MFP User Guide - Page 59

Print bar, Do not put the printhead down on any surface for any reason.

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Print bar The key printing element is a fixed 40 inch (1016 mm) print bar, composed of 8 printheads, numbered 1 to 8 from left to right, looking at the printer from the front. The paper advances at high speed underneath the print bar, which ejects pigmented inks in four colors. The printheads are extremely durable and do not need to be replaced every time an ink cartridge is replaced. They provide excellent results even when the ink cartridges contain a low level of ink. To maintain optimum print quality, the printheads are automatically tested at regular intervals, and automatically serviced when necessary. This takes a little time and can occasionally delay printing. When a printhead eventually needs to be replaced, the front panel will display a message. The printer's paper-loading system includes an auto-indexing facility: whenever paper is loaded, the printer moves the position of the roll to compensate for printhead nozzle usage and extend the lifetime of each printhead. This is an automatic behavior, but you may notice that the front and rear rolls change position slightly between rolls. CAUTION: Do not touch the printhead nozzles. CAUTION: Do not put the printhead down on any surface for any reason. TIP: Printheads are best preserved inside the printer. Moreover, if you remove the printheads, the printer will need to be recalibrated whenever you put them back. Therefore you are recommended not to remove them unnecessarily. Printhead status ● OK: The printhead is working normally. ● Missing: No printhead is detected in the slot. ENWW Print bar 53

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Print bar
The key printing element is a
fixed
40 inch (1016 mm) print bar, composed of 8 printheads, numbered 1 to 8
from left to right, looking at the printer from the front. The paper advances at high speed underneath the
print bar, which ejects pigmented inks in four colors.
The printheads are extremely durable and do not need to be replaced every time an ink cartridge is replaced.
They provide excellent results even when the ink cartridges contain a low level of ink.
To maintain optimum print quality, the printheads are automatically tested at regular intervals, and
automatically serviced when necessary. This takes a little time and can occasionally delay printing. When a
printhead eventually needs to be replaced, the front panel will display a message.
The printer’s paper-loading system includes an auto-indexing facility: whenever paper is loaded, the printer
moves the position of the roll to compensate for printhead nozzle usage and extend the lifetime of each
printhead. This is an automatic behavior, but you may notice that the front and rear rolls change position
slightly between rolls.
CAUTION:
Do not touch the printhead nozzles.
CAUTION:
Do not put the printhead down on any surface for any reason.
TIP:
Printheads are best preserved inside the printer. Moreover, if you remove the printheads, the printer
will need to be recalibrated whenever you put them back. Therefore you are recommended not to remove
them unnecessarily.
Printhead status
●
OK
: The printhead is working normally.
●
Missing
: No printhead is detected in the slot.
ENWW
Print bar
53