Nortel Networks 400 4.0 User Manual
Chapter 23 Replacing or upgrading a power supply
283
BCM200/400 4.0 Installation and Maintenance Guide
To remove a BCM400 standard power supply
1
Set up the BCM400 for maintenance (see
).
2
Disconnect all cables from the front of the base function tray.
3
Disconnect the main unit and the expansion unit (if applicable) from the AC power
connection.
connection.
4
Remove the top cover from the main unit (see
).
5
Attach one end of the grounding strap to your wrist and the other end to a grounded metal
surface.
surface.
6
Disconnect all cables from the I/O card.
7
Locate and disconnect the power supply cables from the media bay backplane and hard disk.
8
Partially remove the base function tray (see
9
Unfasten the power supply cable clamp located on the underside of the main unit top cover
(see
(see
). Gather the power supply cables away from the interior and toward the rear of
the main unit.
10 Remove the four power supply chassis screws from the back of the main unit (see
Place the screws in a safe location.
Figure 142 Remove the BCM400 power supply screws
Warning: Power supply cable management is critical. Loose or incorrectly positioned
cables can result in cable damage.
cables can result in cable damage.
Unfasten cable
clamp - located
on underside of
cover
clamp - located
on underside of
cover
Unfasten exterior
power supply support
bracket mounting
screws
power supply support
bracket mounting
screws
Unfasten power
supply mounting
screws
supply mounting
screws