HP 3000dtn - Manual (Page 136)

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5 Lift and push the latch toward the back of the printer (item 3 in
the graphic).
6 To remove a printhead, place your index finger in the loop of
printhead’s handle, and gently pull up until the printhead releases
from the carriage assembly. Discard the used printhead.
7 Remove the new printhead from its package.
8 Remove the protective tape from the printhead.
9 Remove the plastic cap from the printhead by pulling down as
indicated by the arrow on the cap.
10 Insert the new printhead into its color-coded slot.
11 Press firmly on the printhead to ensure proper contact
after installation.
12 Pull the latch all the way forward and down, and engage the catch
with the hook (item 2 in the graphic). Push the latch towards the
back of the printer. You might have to apply some pressure to close
the latch.
13 Close the printhead cover and the ink cartridge cover.
14 Wait while the printer aligns the printheads. This can take a few
minutes. When the process is complete, an alignment page prints.
If no alignment page prints, check to make sure there is media in
the trays.
Calibrating color
The printer automatically calibrates color when a supply is changed.
To calibrate color using the LCD control panel
1 Press (select button) on the LCD control panel.
2 Press (down arrow button) to highlight CONFIGURE DEVICE ,
and then press (select button).
3 Press (down arrow button) to highlight PRINT QUALITY ,
and then press (select button).
4 Press (down arrow button) to highlight COLOR CALIBRATION ,
and then press (select button).
The following message appears on the LCD control panel:
CALIBRATING...COLOR