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Note: For a translation of this notice, see the System Unit Safety Information manual.
DANGER
An electrical outlet that is not correctly wired could place hazardous voltage
on metal parts of the system or the devices that attach to the system. It is the
responsibility of the customer to ensure that the outlet is correctly wired and
grounded to prevent an electrical shock.
Before installing or removing any additional devices to or from the system,
ensure that the power cables for those devices are unplugged before the signal
cables are connected. If possible, disconnect all power cables from the existing
system before you add a device.
Use one hand, when possible, to connect or disconnect signal cables to prevent a
possible shock from touching two surfaces with different electrical potentials.
During an electrical storm, do not connect cables for display stations, printers,
telephones, or station protectors for communications lines.
Attention: This unit may have more than one power supply cord. To completely remove
power, you must disconnect all power supply cords.
Note: Because many external devices can be connected to the system unit, it may be
impractical for you to switch off power to all the devices and unplug their power
cords.
3. Switch off power to all external devices attached to the system unit, and then unplug the
device power cords from the electrical outlets.
4. Open the rear door of the rack.
Note: If you are servicing the system with signal cables and power cords connected to the
system, do not unplug the power cord from the power distribution bus.
5. If you are servicing the system and signal cables, and power cords are not connected to
the system, unplug the PDB power cord from the electrical outlet.
Rear View
of Rack
Power
Distribution
Bus
Plug for AC
Electrical
Outlet
Removal and Replacement Procedures
4-3
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