Nortel Networks BCM200/400 - Manual (Page 238)

238 Chapter 20 Preparing hardware for maintenance or upgrades
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Figure 105 provides an overview of the process for preparing the BCM system hardware for
maintenance or upgrade procedures.
Figure 105 Prepare for maintenance overview
Warning: Maintain a current backup of your system
When you replace the hard disk, you must restore the BCM system programming from the
backup.
Caution: Do not use an electric or magnetized screwdriver near the hard disk. You can
lose the information stored on the disk. Shock can damage the hard disk. Do not drop or
hit the hard disk drive.
Warning: You must remove all of the connections to the BCM base function tray before
you power the system down. Failure to disconnect lines before power down can cause
damage to the system.
Warning: Protect the hardware components against damage from electrostatic discharge.
Always wear a grounded wrist strap before you handle components. Always place the
components in a static-free container.
Shut down
the system
Disconnect cables
from the front of
the main unit and
expansion unit
Remove AC power
plugs from both
units
Remove from rack
or wall.
Place on
static-free surface
Remove the top
from the unit
Perform
maintenance/
upgrade
procedure
Restore power
to the units
Reconnect
cables to the
front of the units
Test system
functions