11. Remove the screws keeping the defective 48V power supply in place from the side of the
rack.
12. Replace the defect 48V power supply with the new one.
13. Reconnect the wires for the 48V power supply.
14. Reinstall controller module in reverse order and reconnect the 2 wires for the fan and
cables for the teach pendant.
15. Carefully put back the aluminum cover plate, making sure to mount it correctly and fix into
place with the screws.
16. Connect power and verify that teach pendant works properly.
Merge Control Box
WARNING
Before replacing ANY components inside the control box, it is IMPORTANT to do
a complete shutdown.
Follow the first 3 steps in section Complete rebooting sequence.
When completing the following replacement, please follow the guidelines laid out in section
Handling ESD-sensitive parts
Service Manual 73 UR5
5.Service and Replacement of parts
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