Universal Robots UR5 Service Manual page 72

5. Service and Replacement of parts
3. Remove the 5 torx screws and followed by the aluminum cover.
4. Carefully remove all plugs and connectors from the Safety Control Board.
5. Remove the 14 screws holding the board in place.
6. Replace Safety Control Board with new one and tighten the 14 screws to fasten the board
in place.
7. Insert all connectors and plugs back into their correct positions.
UR5 66 Service Manual