Dell Precision 5480 Service Manual page 48

Steps
1. Align the screw holes on the USH board FPC (for models shipped with a USH board) and touchpad FPC.
2. Replace the four (M1.4x1.2) screws to secure the USH board FPC (for models shipped with a USH board) and touchpad FPC
to the system board.
3. Flip-over the system board and align the screw holes on the system board with the holes on the palm-rest and keyboard
assembly.
4. Replace the three (M2x4) screws to secure the system board to the palm-rest and keyboard assembly.
5. Replace the three (M2x4) screws to secure the right USB Type-C bracket on the system board.
6. Adhere the left and right tweeter speakers to their compartments on the palm-rest and keyboard assembly and route the
speaker cables through the metal clips on the system board.
7. Connect the left and right speaker cables to the connectors on the system board.
8. Connect the power button board with fingerprint reader FPC to the connector on the system board and close the latch.
9. Connect the USH board FPC (for models shipped with a USH board) and touchpad FPC to their respective connectors and
close the latch.
10. Connect the battery LED FPC to the system board and close the latch.
11. Route the WLAN antenna cables using the metal clips on the system board and connect them to the WLAN module.
12. Tighten the single (M1.6x2.3) captive screw to secure the WLAN bracket on the system board.
13. Place the interposer board and connect the display FPC to the system board.
14. Replace the four (T5, M1.4x4) Torx screws that secure the display FPC holder and display FPC to the system board.
48 Removing and installing components