Compaq AlphaServer 1200 User Manual page 238

Power Supply Removal
1. Shut down the operating system and power down the system.
2. Remove the top cover and right side panel.
3. Disconnect all internal and external cables from the power supply.
4. Loosen the four screws that secure the power supply to the outside of the unit.
5. Loosen the two screws that secure the internal end of the power supply to the
system unit.
6. Slide the power supply toward the internal side, lift it up off its tabs, and remove
it through the top of the enclosure.
NOTE: If you are removing the bottom power supply, you must remove the top
power supply first.
Power Supply Installation
1. Insert the power supply through the top of the enclosure.
2. Slide the power supply over its tabs and toward the back panel so that it aligns
with the screw holes in the system unit frame. The first supply slides directly
into the lower position from the side of the system unit. The second power
supply slides down from above the system unit and rests upon a ledge.
3. Tighten the two screws that secure the internal end of the power supply.
4. Tighten the four screws that secure the power supply to the outside of the unit.
Do not use the screws that secured the protective shield.
5. Connect all internal and external cables to the power supply. If you are
installing a second power supply, an additional internal cable is required for
connecting the two supplies. Each power supply connects directly to an AC
outlet.
7-16 User's Guide