All rights reserved  59  Servicemanual_UR3_en_rev3.1.2 
 
3.2.6 Replacement of 12V power supply 
 
Take care of ESD handling 3.2.1 Handling ESD-sensitive parts 
How to replace 12V power supply in Controller box 
Note: use the same procedure for power down and removing the aluminium cover 
and cables for teach pendant as in chapter 3.2.4 Replacement of teach pendant 
 
To replace the 12V power supply follow exactly the same steps as for the procedure in  
chapter 3.2.5 Replacement of 48V power supply 
 
1.  The 12V power supply is placed in top of rack. The screws holding it in the frame are placed on the 
sides. 
 
 
 
2.  Replace 12V power supply with new one. 
 
3.  Reconnect the wires for the 12V power supply. 
 
4.  Re-install Controller module in reverse order and connect the 2 wires for the fan and cables for the 
teach pendant. 
 
5.  Carefully attach the grey aluminum cover, make sure to mount it correct and fix it with the screws. 
 
6.  Connect power and verify that teach pendant works properly.