5-1

Precautions

The following warnings and cautions apply throughout this chapter. Only a technically qualified person should integrate and configure the system.

The only procedure that can safely be done with the system power on is installing (or hot-swapping) an SCA drive/carrier assembly in one of the SCSI hot-swap drive bays or hot-swapping a failed fan module or power supply. For any other procedures inside the system, turn off system power and disconnect the AC power cord(s).

Warning: Before doing the procedures in this chapter, make sure that your system is powered off and unplug the AC power cord from the back of the chassis. Failure to disconnect power before opening your system can result in personal injury and equipment damage.

Warning: System power on/off. The DC push-button on/off switch (a convex button) on the front panel DOES NOT turn off the system AC power. To remove power from system, you must unplug the AC power cord(s) (from wall outlet or power supply).

Warning: Hazardous conditions, power supply.

Hazardous voltage, current, and energy levels are present inside the power supply. There are no user serviceable parts inside it; servicing should be done by technically qualified personnel.

Warning: Hazardous conditions, devices & cables.

Hazardous electrical conditions may be present on power, telephone, and communication cables. Turn off the system and disconnect the power cords, telecommunications systems, networks, and modems attached to the system before opening it. Otherwise, personal injury or equipment damage can result.

Upgrades and Options

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Packard Bell MH4000 manual Precautions, Upgrades and Options