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Replacing a Power Supply with the System Power Off
Before performing the following procedure, read and understand all of the safety notices beginning with
"Safety Notices" on page ix.
Notes:
1. Do not connect the power cables to the power source until you are instructed to do so.
2. During normal operation, the secondary power-supply bay must have either a power supply or filler
panel installed for proper cooling.
To replace a power supply, do the following:
1. Ensure the system is in the service position as described in "Placing the Model 275 into the Service
and Operating Position" on page 248.
2. Ensure the service access cover has been removed as described in "Removing the Service Access
Cover" on page 249.
3. Grasp the power supply handles located on top of the new power supply. Pivot the power supply
handles upward to 90 degrees. This action puts the handle cams into the correct position to help seat
the power supply into its connector.
4. Carefully insert the new power supply into the power supply bay.
5. Lower the power supply handles, carefully pressing the power supply into the connector. The spring
latch located on the underside of each handle will snap into place, indicating that the power supply is
seated correctly and locked into position.
1 Power supply
2 Power supply handle (2)
3 Spring Latch (2)
6. Plug the power cables into the rear of the power supply.
7. Note the state of the LEDs on the top of the power supply. If the LEDs indicate the power supply is
operating normally, continue to the next step. If not, remove the power supply from the system and
repeat the procedure starting with step 3. If, after repeating the procedure, the power supply in not
operating normally, contact your service representative.
8.
Replace the service access cover as described in "Replacing the Service Access Cover" on page
249..
9. Return the system to the operating position as described in "Placing the Model 275 into the Service
and Operating Position" on page 248.
10. Start the system as described in "Starting the System" on page 247.
290
IntelliStation POWER 9114 Model 275 Service Guide
4 Fault LED (Amber)
5 DC Good LED (Green)
6 AC Good LED (Green)
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