Service manual

Removal and Replacement 7-43
Removal
1. Shut down the operating system and power down the system.
2. Expose the system drawer.
3. Remove the cover to the power section of the drawer. Remove the two Phillips
head screws holding the cover in place and slide it off the drawer.
4. Release the power supply tray by removing the two Phillips head screws on the
side of the drawer. See
➍.
5. Lift the power supply tray to release it from the sheet metal and slide it out from
the drawer until it locks (about 4 inches).
6. Tilt the tray to allow easier access to the back of the power supplies.
7. Unplug the connectors at the rear of the supply that is being replaced.
8. Unscrew the four Phillips head screws at the front of the tray that hold the power
supply in place. Also unscrew the two screws at the back of the power supply.
See
➑.
9. Remove the power supply.
Replacement
Reverse the steps in the Removal procedure.
Verification
Power up the system. If the system has redundant power, the system will power up
regardless of whether the replaced power supply is faulty. In this case look at the
PCM LEDs to determine that the power supply is functioning properly. If the system
does not have redundant power, it will not power up.