Removal and Installation Power Supply Unit (PSU) Removal WARNING Switch off the Printer and remove the Power Cord. NOTE Refer to the table on Page 8-4 for information on screw types. 1. Remove the LAN Card - Refer to Page 8-76 . 2. Remove the Left Rear Cover - Refer to Page 8-15 . 3. Remove the Right Rear Cover - Refer to Page 8-16 . 4. Remove the Electronics Module Cover - Refer to Page 8-79 . 5. Disconnect and remove the Hard Disk Drive for safety reasons - Refer to Page 8-74 . PCA PS Connector 6. Disconnect the PCA Power Supply connector from the Main PCA. 8-88 HP DesignJet 5000 and 5500 Series Printers Service Manual