Maintenance and service 
  11.1 Removing and installing hardware components 
SIMATIC Box PC 627 
Operating Instructions, Release 05/2006, A5E00362052-03 
11-9 
How to remove the motherboard 
7  Remove the 6 screws (1) and the processor fan: Unscrew 4 screws (2). 
 
 
 
8  Remove the 4 hexagonal bolts on the interfaces. 
 
 
 
9  Lift out the motherboard.