Dell Precision 3470 Service Manual page 48

Steps
NOTE: The system board can be removed and installed with the thermal module attached in order to simplify the procedure
and preserve the thermal bond between the system board and heat-sink. In order to do so, technicians must also remove
the two (M2x5) screws the secure the system fan to the system board.
1. Slide the system board to make the USB Type-C connector to toe-in to the hinge saddle and align the screw holes on the
system board with the screw holes on the palm-rest assembly and keyboard assembly.
2. Replace the four (M2x3) screws to secure the system board to the palm-rest assembly and keyboard assembly.
3. Align and place the USB Type-C bracket on the system board.
4. Replace the three (M2x5) screws that secure the USB Type-C bracket to the system board.
5. Route the coin-cell battery cable under the system board and connect the coin-cell battery cable to the connector on the
system board.
48 Removing and installing components