HP Designjet 4500 Printer series - Manual (Page 85)

10. Following the same instructions, install the other three ink cartridges.
11. Close the ink cartridge door.
Install the printheads
1. Wait (about a minute) until you see this front panel message.
2. Open the printer window.
3. Remove the packing tape that is holding down the printhead carriage latch.
ENWW Install the printheads 71
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