Removal and Installation 4. Disconnect the Electrical Cable from the rear of the Ink Cartridge Tube Connector. 5. Disconnect the Air Tube. 1 2 6. Twist the 3 latches at the rear of the Ink Cartridge Tube Connector and release the complete Assembly. 8-7 HP DesignJet 5000 and 5500 Series Printers Service Manual