NEC Express5800/R320c-E4 Maintenance Manual page 133

Chapter 2 Configuring and Upgrading the System
12. After pressing the CPU softly against the socket, and close the plate.
13. Fix the CPU by pushing down the lever marked with "←
14. Fix the CPU by pushing down the lever marked with "
15. Place the heat sink on the CPU.
Important Do not touch the cooling sheet that is attached on the back of the heat sink with your
hand.
Express5800/R320c-E4, R320c-M4 Maintenance Guide (Linux)
5. Installing Optional Devices
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