Nortel Networks BCM200/400 - Manual (Page 284)

284 Chapter 23 Replacing or upgrading a power supply
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Figure 134 Standard power supply replacement overview
Removing a BCM200 power supply
If the standard power supply fails, the system is down. Use this procedure to remove the standard
power supply from a BCM200 main unit.
To remove the BCM200 power supply
1 Set up the BCM200 for maintenance (see “Performing a system shutdown” on page 239 ).
2 Disconnect all cables from the front of the base function tray. Disconnect the main unit and the
expansion unit (if applicable) from the AC power connection.
3 Remove the top cover from the main unit (see “Removing the main unit top cover” on page
252 ).
4 Attach one end of the grounding strap to your wrist and the other end to a grounded metal
surface.
5 Locate and disconnect the power supply cables from the I/O card, media bay backplane, and
hard disk.
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.
Warning: Power supply cable management is critical. Loose or incorrectly positioned
cables can result in cable damage.
System down
Set up unit for
maintenance
Remove failed
power supply
Restore unit to
operation
Check Power LED
Reconnect power
supply cables
Check
connections
Install new power
supply
Disconnect
power supply
cables. Note
cable routing