The Power Share Board; Replacing The Power Share Board (Psb) - Silicon Graphics 1400 Server Family Maintenance And Upgrade Manual

The Power Share Board

The server comes with three power supplies already installed for highest power
availability. If one supply fails, the system can operate using two until a replacement is
installed. Your SGI 1400 system has a power share board (PSB). The PSB supports one to
three supplies.
You can replace an existing power share board by purchasing a kit through your SGI 1400
customer sales or service representative. The following sections describe how to replace
a PSB.

Replacing the Power Share Board (PSB)

1. Observe the safety and ESD precautions at the beginning this chapter.
2. Label and disconnect all peripheral cables and all telecommunication lines
connected to I/O connectors or ports on the back of the system, and unplug all AC
power cords from the system and wall outlet.
3. Remove all the power supplies, see the SGI 1400 Server Family User's Guide if
necessary.
4. Remove the access cover.
5. Open the front subchassis.
6. Remove the memory module.
7. Label and disconnect all cables to the baseboard.
8. Remove the electronics bay.
9. Disconnect the cables from the existing power share board (PSB). The board is
behind the electronics bay, see Figure 1-13.
10. Remove and save the two screws (see Figure 1-14) that attach the bracket to the
chassis.
11. To remove the board, lift the BRACKET END first; when you have freed the bracket
from the tabs on the chassis, lift out the entire board.
12. Remove the screws that attach the bracket to the board, see Figure 1-15. Set the
board aside on an antistatic surface or conductive foam pad.
13. Attach the bracket to the new PSB using the correct number of screws.
The Power Share Board
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