NEC Express5800 Series User Manual page 289

5.
Hold the black levers of the CPU/IO module and pull it off.
Pull it off until it is locked and stopped.
IMPORTANT:
 Do not hold part other than the handle to pull the module.

Handle the CPU/IO module carefully. Do not drop the module or bump it against
parts in the device when you remove it.
6.
The CPU/IO module is locked on the way and cannot be pulled out. Lower the lock on the side
of CPU/IO module and unlock it, and then pull it out.
7.
Pull out the CPU/IO module gently and carefully place it on a flat and sturdy table.
Avoid the dusty or humid place.
This allows you to access the devices in the CPU/IO module. For more information on
how to handle these devices, see the associated sections.
Lock
System Upgrade 8-13