User's 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 “Performing a system shutdown” on page 231).
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.
4 Remove the top cover from the main unit (see “Removing the main unit top cover” on page
244).
5 Attach one end of the grounding strap to your wrist and the other end to a grounded metal
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 “Removing the base function tray” on page 234).
9 Unfasten 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.
10 Remove 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
Warning: Power supply cable management is critical. Loose or incorrectly positioned
cables can result in cable damage.
Unfasten cable
clamp - located
on underside of
cover
Unfasten exterior
power supply support
bracket mounting
screws
Unfasten power
supply mounting
screws