NEC Express5800/120Mc2 series, Руководство пользователя

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4-2 Upgrading Your System
General Information
! WARNING
The DC push-button on/off switch on the front panel does
not turn off the system AC power. Also, +5vdc is present on
the system board whenever the AC power cords are
connected between the system and an AC outlet. Before
doing the procedures in this manual, make sure that your
system is powered off and unplug the AC power cords from
the back of the chassis. Failure to disconnect power before
opening your system can result in personal injury and
equipment damage.
!
CAUTION
The server management logic on your system board
monitors and logs system voltage changes. When powering
down your system you may experience a 1–5 second delay
from the time you press the push-button power on/off switch
on the front panel and your system powering down. This is
normal system operation and is required by the server
management logic.
!
CAUTION
Operating your system with the side panels removed can
damage your system components. For proper cooling and
airflow, always replace the side panels before powering on
your system.
Note:
Your system error log will be lost, if your system
ac power source is off or disconnected.
Contact your sales representative or dealer for a list of approved optional
peripheral devices.
Static Precautions
An electrostatic discharge (ESD) can damage disk drives, option boards, and
other components. You can provide some ESD protection by wearing an
antistatic wrist strap attached to chassis ground when handling system
components.
Electronic devices can be easily damaged by static electricity. To prevent
damage, keep them in their protective packaging when they are not installed in
your system.