NEC MH4500 manual Observing Static Precautions

This chapter includes procedures for

replacing/upgrading the real-time battery, Pentium Xeon processor cartridge, and DIMM modules on the system board

adding optional ISA and PCI boards

Tinstalling 3 ½-inch SCSI hard drives

installing optional 5 1/4-inch devices (tape drive, other device).

Contact your sales representative or dealer for a list of approved optional peripheral devices.

!WARNING

The DC push button on/off switch on the front panel does not turn off system AC power. Also, +5vdc is present on the system board whenever the AC power cord is connected between the system and an AC outlet. Before performing any procedures, first power off the dc push button switch located on the front panel. Make sure your system is powered off and the AC power cord is unplugged from the system. Failure to disconnect power before opening your system can result in personal injury and equipment damage.

!CAUTION

The server management logic on the system board monitors system voltage changes. When powering down your system, you may experience a 1- to 5-second delay from the time you press the push button power on/off switch and your system powering down. This is normal system operation and is required by the server management logic.

!CAUTION

Operating your system with the access cover removed can damage system components. For proper cooling and airflow, always replace the access cover before powering on.

Observing 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 (any unpainted metal surface) when handling system components.

4-2 Upgrading Your System