NEC Express5800/R320a-E4 User Manual page 259

9.
Detach the socket cover on the CPU socket.
IMPORTANT:
Keep and store the removed socket folder with care.
10.
Place the CPU on the socket carefully.
TIPS:
Pay attention to the direction of the CPU.
The CPU and socket have pin marks to prevent
misinsertion. Check the pink marks of the CPU and
the socket, and insert the CPU correctly.
11.
After pressing the CPU softly against the socket,
place the CPI socket holder back to its original
place.
12.
Return the socket lever back to its original place.
System Upgrade 8-27