15
2 Working Inside the System
Tools and Supplies Needed
Phillips (cross head) screwdriver (#2 bit)
Antistatic wrist strap (recommended)
Needle-nosed pliers
Safety: Before You Remove the Side Cover
Before removing the system side cover for any reason, observe these safety guidelines.
1.
Turn off all peripheral devices connected to the system.
2.
Turn off the system by pressing the power button on the front of the system. Then unplug the
AC power cord from the system or wall outlet.
3.
Label and disconnect all peripheral cables and all telecommunication lines connected to I/O
connectors or ports on the back of the system.
4.
Provide some electrostatic discharge (ESD) protection by wearing an antistatic wrist strap
attached to chassis ground of the system—any unpainted metal surface—when handling
components.
Warnings and Cautions
These warnings and cautions apply whenever you remove the side cover of the system to access
components inside the system. Only a technically qualified person should integrate and configure
the system.
WARNINGS
The power button (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 from the wall outlet or the system.
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.
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.
