P
RECAUTIONARY
M
EASURES
XIII
ified in this manual. Use of other products / components will void the UL listing and other
regulatory approvals of the product and will most likely result in non-compliance with
product regulations in the region(s) in which the product is sold.
System power on/off:
To remove power from system, you must remove the system from
rack. Make sure the system is removed from the rack before opening the chassis, adding,
or removing any non hot-plug components.
Hazardous conditions, devices and cables:
Hazardous electrical conditions may be
present on power, telephone, and communication cables. Turn off the system and discon-
nect the cables attached to the system before opening it. Otherwise, personal injury or
equipment damage can result.
Electrostatic discharge (ESD) and ESD protection:
ESD can damage drives, boards, and
other parts. We recommend that you perform all procedures in this chapter only at an ESD
workstation. If one is not available, provide some ESD protection by wearing an antistatic
wrist strap attached to chassis ground any unpainted metal surface on the server when
handling parts.
ESD and handling boards:
Always handle boards carefully. They can be extremely sensi-
tive to electrostatic discharge (ESD). Hold boards only by their edges. After removing a
board from its protective wrapper or from the server, place the board component side up
on a grounded, static free surface. Use a conductive foam pad if available but not the
board wrapper. Do not slide board over any surface.
Installing or removing jumpers
: A jumper is a small plastic encased conductor that slips
over two jumper pins. Some jumpers have a small tab on top that can be gripped with fin-
gertips or with a pair of fine needle nosed pliers. If the jumpers do not have such a tab,
take care when using needle nosed pliers to remove or install a jumper; grip the narrow
sides of the jumper with the pliers, never the wide sides. Gripping the wide sides can dam-
age the contacts inside the jumper, causing intermittent problems with the function con-
trolled by that jumper. Take care to grip with, but not squeeze, the pliers or other tool used
to remove a jumper, or the pins on the board may bend or break.
General Information
The information about rack and the wording “rack” in this technical guide supports the
organization of Open Compute definition.
The term
Rack
as found in this technical guide referes to the term
Rack
or
Open Rack
as
described and used in the Open Compute Project definition.
Before servicing this system, it is recommened to read this technical guide completely to
be aware of any safety issues or requirements involved in the servicing of this system.
