HP Carrier-grade cc3300 User Information and Service Guide - HP Carrier-Grade - Page 95

Removing and Installing the Top Cover

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WARNING Power Button: Shutting down the server with the power button on the front of the chassis DOES NOT remove all power from the server. To remove all power from server, you must also unplug/disconnect the power cord(s) from the server. Unplugging/disconnecting the power cord(s) from the server removes the +5 Volt standby power that is present when the server is powered down. Hazardous conditions, power supply: Hazardous voltage, current, and energy levels are present inside the power supply. There are no user-serviceable parts inside the power supply; technically qualified personnel should do servicing. Hazardous conditions, devices, and cables: Hazardous electrical conditions may be present on power, telephone, and communication cables. Turn off the server and unplug/disconnect the power cord(s), telecommunications systems, networks, and modems attached to the server before opening it, otherwise personal injury or equipment damage can result. Hazardous conditions, processors and power supplies: Thermal conditions may be present in the processor/memory complex. Allow all fans to continue to run until they shut down on their own after power has been turned off. After the fans stop, you can unplug/disconnect the power cord(s). CAUTION Electrostatic discharge (ESD) and ESD protection: ESD can damage disk drives, boards, and other parts. We recommend that you do all procedures in this section only at an ESDprotected 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 your server when handling parts. ESD and handling boards: Always handle boards carefully. They can be extremely sensitive to ESD. Hold boards only by their edges. After removing a board from its protective wrapper or from the server, place it on a grounded surface free of static electricity. Do not slide boards over any surface. Cooling and airflow: For proper cooling and airflow, always install the chassis covers before turning on the server. Operating the server without the covers in place can damage server parts. Removing and Installing the Top Cover CAUTION For proper cooling and airflow, do not operate the server with the cover removed. Always reinstall the cover before turning the server on. The server comes with a removable top cover. Removal of this cover is necessary when installing or removing many components. You do not have to remove the top cover when removing or installing power supplies, peripheral drive assemblies (CD-ROM or CD+RW/DVD), or hard drives. WARNING If rack mounted, make sure that the rack is anchored securely so it will not tilt forward when the server chassis is extended. Should the rack tip forward, a crush hazard exists that could cause serious injury. To remove the top cover, follow this procedure: Chapter 9 95

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Chapter 9
95
WARNING
Power Button: Shutting down the server with the power button on the front of the
chassis DOES NOT remove all power from the server. To remove all power from
server, you must also unplug/disconnect the power cord(s) from the server.
Unplugging/disconnecting the power cord(s) from the server removes the +5 Volt
standby power that is present when the server is powered down.
Hazardous conditions, power supply: Hazardous voltage, current, and energy levels
are present inside the power supply. There are no user-serviceable parts inside the
power supply; technically qualified personnel should do servicing.
Hazardous conditions, devices, and cables: Hazardous electrical conditions may be
present on power, telephone, and communication cables. Turn off the server and
unplug/disconnect the power cord(s), telecommunications systems, networks, and
modems attached to the server before opening it, otherwise personal injury or
equipment damage can result.
Hazardous conditions, processors and power supplies: Thermal conditions may be
present in the processor/memory complex. Allow all fans to continue to run until
they shut down on their own after power has been turned off. After the fans stop,
you can unplug/disconnect the power cord(s).
CAUTION
Electrostatic discharge (ESD) and ESD protection: ESD can damage disk drives, boards, and
other parts. We recommend that you do all procedures in this section only at an ESD-
protected 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 your server
when handling parts.
ESD and handling boards: Always handle boards carefully. They can be extremely sensitive to
ESD. Hold boards only by their edges. After removing a board from its protective wrapper or
from the server, place it on a grounded surface free of static electricity. Do not slide boards
over any surface.
Cooling and airflow
:
For proper cooling and airflow, always install the chassis covers before
turning on the server. Operating the server without the covers in place can damage server
parts.
Removing and Installing the Top Cover
CAUTION
For proper cooling and airflow, do not operate the server with the cover removed. Always
reinstall the cover before turning the server on.
The server comes with a removable top cover. Removal of this cover is necessary when installing or removing
many components. You do not have to remove the top cover when removing or installing power supplies,
peripheral drive assemblies (CD-ROM or CD+RW/DVD), or hard drives.
WARNING
If rack mounted, make sure that the rack is anchored securely so it will not tilt
forward when the server chassis is extended. Should the rack tip forward, a crush
hazard exists that could cause serious injury.
To remove the top cover, follow this procedure: