5.3.2 What to Do

1. Disconnect the CPU core voltage power cable and the CPU core voltage power sense cable from the power distribution board at connectors J0202 and J0203.

   For information about cable connector locations, see "5.5 How to Connect the System Cables".

2. Disconnect the UltraSCSI data cable from the main logic board at connector J1801.

3. Disconnect the I/O power cable from the power distribution board at connector J0210.

4. Disconnect the main power cable from the power distribution board at connectors J0201 and J0207.

5. Disconnect the CPU power sense cable from the power distribution board at connectors J0205 and J0206.

6. Disconnect the keyswitch/power button/LED cable from the power distribution board at connector J0500.

7. Loosen the three captive Phillips screws that secure the power distribution board cover panel to the chassis.

8. Remove the power distribution board cover panel.

   1. Tilt the panel toward the back of the system approximately 30 degrees.

      Hold the cover panel by the edge nearest the chassis front.

   2. Gently pull the cover panel forward and up, out of the system.

      Set the power distribution cover panel aside.

   

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   Caution -

   Be sure that the AC power cord(s) has been disconnected from the system before continuing. Attempting to remove the power distribution board while the AC power cord is plugged into a power source can result in serious personal injury.

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9. Remove the left (when looking from the back of the system) AC power connector assembly from the chassis.

   Keep the cable attached to the connector assembly. Use a Phillips #2 screwdriver to remove the screw. Set the end of the cable aside in the back of the system so that the cable doesn't interfere with lifting the power distribution board out of the chassis.

   

10. Remove the seven screws securing the power distribution board to the chassis.

    

11. Adjust the cable connected to the center AC power connector assembly so that it doesn't interfere with lifting the power distribution board out of the chassis.

12. Lift the power distribution board out of the chassis.

    Place it on an antistatic mat.