HP Designjet 4000 Printer series - Manual (Page 43)

4. Lift up the cover. This will give you access to the setup printheads.
5. Before removing the setup printheads, look at the window on top of each one and
check that the printhead contains ink. If it does not, contact your customer service
representative.
6. To remove a setup printhead, lift up the blue handle.
41
How do
I assemble
the
printer?