Power supply

Use this procedure to service the power supply.

1. Determine if this procedure can continue concurrently

   To continue the repair concurrently, the following conditions must be true: A properly functioning power supply must already be installed in the system. This power supply has three LEDs, which must be set as follows: ac Input - on, not blinking dc Output - on, not blinking Fault/Identify - off

   Is there a functioning power supply meeting these conditions?
   Yes	No
   ↓	Go to step 4

2. Determine if you are able to exchange concurrently

   Attention: If you are performing this procedure concurrently, from the moment the power cord is disconnected, the exchange of the power supply must be completed in less than two minutes. If you cannot replace the power supply in less than two minutes, the system will automatically shut down. READ the following steps, have the replacement power supply ready, then decide if you are ready and able to continue this repair within the two-minute limit. Remove the power supply: Read the following steps. Do not perform them yet. At the back of the system, disconnect the power cord that corresponds to the power supply being serviced. Rotate the power supply handle (A) in the direction shown to unseat the power supply. Pull the power supply straight out from the I/O subsystem. Install the new Power Supply: Push the power supply straight into the I/O subsystem. Rotate the power supply handle (A) in the direction shown to seat the power supply. At the back of the system, reconnect the power cord to the corresponding power supply.

   Are you ready to perform this repair in less than two minutes?
   Yes, continue concurrently	No, continue with power off	No
   ↓	Go to step 4	This ends the procedure.

3. The power supply will be serviced concurrently. The unit will stay powered on while the power cord that corresponds to the power supply is removed. The unit can only run for a couple minutes with one power supply. Do not remove the power cord until instructed to do so.

   Go to step 7 - Concurrent.

4. The procedure can only be performed with power off.

   Select an action
   Non-concurrent repair. Power off the unit and continue the repair.
   ↓		This ends the procedure.

5. Rotate the power supply handle (A) in the direction shown to unseat the power supply. Pull the power supply straight out from the I/O subsystem. Repeat these steps to remove the other power supply. Turn the blue thumbscrews (B) in the direction shown to unlock the PCI shuttle assembly.

6. Are you performing a miscellaneous equipment specification (MES) install operation?
   Yes	No
   ↓	Go to step 7

7. Remove the Power Supply

   Non-concurrent

   Rotate the power supply handle (A) in the direction shown to unseat the power supply. Pull the power supply straight out from the I/O subsystem. Repeat these steps to remove the other power supply. Turn the blue thumbscrews (B) in the direction shown to unlock the PCI shuttle assembly.

   Concurrent

   At the back of the system, disconnect the power cord that corresponds to the power supply being serviced. This action begins the two-minute time limit to exchange the power supply. Rotate the power supply handle (A) in the direction shown to unseat the power supply. Pull the power supply straight out from the I/O subsystem.

8. Exchange the Power Supply

   At the back of the system, disconnect the power cord that corresponds to the power supply being serviced. This begins the two-minute time limit to exchange the power supply concurrently. Rotate the power supply handle (A) in the direction shown to unseat the power supply. Pull the power supply straight out from the I/O subsystem. Push the replacement power supply straight into the I/O subsystem. Rotate the power supply handle (B) in the direction shown to seat the power supply. At the back of the system, reconnect the power cord to the corresponding power supply. This actionends the two-minute time limit to exchange the power supply concurrently.

9. Install the Power Supply

   Push the power supply straight into the I/O subsystem. Rotate the power supply handle (A) in the direction shown to seat the power supply. At the back of the system, reconnect the power cord to the corresponding power supply.

10. Verify the repair

    Go to Verifying a repair.