400 Upgrade and Maintenance Manual CX2550/60/70 M4
Figure 290: Installing the LC heat sink for PCIe switch 2
Ê Carefully seat the heat sink onto the PCIe switch 2.
Ê Fasten the two captive screws (see circles) as follows:
Ê At first, fasten the two captive screws one by one by hand rotating them 
three turns.
Ê Then, fasten the two captive screws one by one by hand until the screws 
are completely tightened.