Nortel Networks BCM200, 400 4.0 manual To remove a BCM400 standard power supply

Chapter 23 Replacing or upgrading a power supply 283

Warning: Power supply cable management is critical. Loose or incorrectly positioned cables can result in cable damage.

To remove a BCM400 standard power supply

1Set up the BCM400 for maintenance (see “Performing a system shutdown” on page 231).

2Disconnect all cables from the front of the base function tray.

3Disconnect the main unit and the expansion unit (if applicable) from the AC power connection.

4Remove the top cover from the main unit (see “Removing the main unit top cover” on page 244).

5Attach one end of the grounding strap to your wrist and the other end to a grounded metal surface.

6Disconnect all cables from the I/O card.

7Locate and disconnect the power supply cables from the media bay backplane and hard disk.

8Partially remove the base function tray (see “Removing the base function tray” on page 234).

9Unfasten the power supply cable clamp located on the underside of the main unit top cover (see Figure 142). Gather the power supply cables away from the interior and toward the rear of the main unit.

10Remove the four power supply chassis screws from the back of the main unit (see Figure 142). Place the screws in a safe location.

Figure 142 Remove the BCM400 power supply screws

	Unfasten cable
	clamp - located
Unfasten power	on underside of
supply mounting	cover
screws	Unfasten exterior
	power supply support
	bracket mounting
	screws

BCM200/400 4.0 Installation and Maintenance Guide