Nortel Networks 400 4.0 manual Removing a BCM200 power supply, To remove the BCM200 power supply

276Chapter 23 Replacing or upgrading a power supply

Figure 133 Standard power supply replacement overview

System down

Set up unit for maintenance

Disconnect power supply cables. Note cable routing

Remove failed power supply

Install new power supply

Reconnect power supply cables

Check connections

Restore unit to operation

Check power LED

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.

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.

To remove the BCM200 power supply

1Set up the BCM200 for maintenance (see “Performing a system shutdown” on page 231).

2Disconnect 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.

3Remove the top cover from the main unit (see “Removing the main unit top cover” on page 244).

4Attach one end of the grounding strap to your wrist and the other end to a grounded metal surface.

5Locate and disconnect the power supply cables from the I/O card, media bay backplane, and hard disk.

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