HP Designjet 4000 Printer series - Manual (Page 45)

2. Lower all the printheads vertically into their correct positions.
3. Seat the printheads slowly and carefully.
If you have difficulty, see “The problem is I cannot insert a printhead” on page 207.
4. Make sure the printheads are correctly seated. When all the printheads are
installed, the front panel prompts, “Close printhead cover and window”.
5. If Reseat is displayed on the front panel, see “The problem is the front panel
keeps telling me to reseat or replace a printhead” on page 207.
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How do
I assemble
the
printer?