How to Resolve an X4250 Power Distribution Board Failure

Asset ID:	1-71-1461403.1
Update Date:	2012-10-02
Keywords:

Solution Type Technical Instruction Sure

Solution 1461403.1 : How to Resolve an X4250 Power Distribution Board Failure

Applies to:

Sun Fire X4250 Server - Version Not Applicable and later
Information in this document applies to any platform.

Goal

How to solve X4250 Power distribution board failure

Fix

DISPATCH INSTRUCTIONS

WHAT SKILLS DOES THE ENGINEER NEED:(IS A SITE ENGINEER AVAILABLE?)
WZT-6280: Sun Fire X4x50 Servers Installation and Administration
Trained Engineer / Sun Partner Training

TIME ESTIMATE: 90 minutes

DELIVERY REQUIREMENT:
Schedule maintenance window

Task Complexity = 3

FIELD ENGINEER INSTRUCTIONS

PROBLEM OVERVIEW:
Failed Power Distribution Board

WHAT STATE SHOULD THE SYSTEM BE IN TO BE READY TO PERFORM THE RESOLUTION ACTIVITY? :
Data backup not required but recommended as a precaution
Orderly shutdown of applications
Shutdown of OS and power down of server

WHAT ACTION DOES THE ENGINEER NEED TO TAKE:
Ensure standard ESD procedures are followed

Note: It is easier to service the power distribution board (PDB) with the bus bar assembly attached.If you are replacing a faulty PDB, you must remove the bus bar assembly from the old board and attach it to the new PDB.

1. Power off the server
2. Disconnect and remove the power cords
3. Remove the power supplies by pressing the green tab towards the center of the power supply and pulling out
4. Remove the top cover by pulling the release tabs to release the door and moving the fan door to the open position. Press the top cover release button and slide the cover back to allow you to lift it straight up
5. Remove the air duct.
6. Remove the PCIe cards and risers.
7. Disconnect the power distribution board ribbon cable connecting system board and PDB
8. Disconnect the drive data cables.
9. Remove the CPU heatsinks covering the busbar screws to access the bus bar.
10. Remove the 4 screws that secure the motherboard to the bus bar. Use a No. 2 Phillips screwdriver.
11. Loosen the captive motherboard retaining screw.
12. Lift the motherboard tray out of the chassis. Move the motherboard carefully. Gently slide the motherboard to the rear and carefully lift it upward.
13. Disconnect the top cover interlock cable from the power distribution board.
14. Disconnect the PDB ribbon cable from the Power Supply Unit backplane.
15. Remove the four screws securing the L shaped bus bars from the PSU backplane to the PDB.
16. Remove the No. 2 Phillips screw securing the PDB to the chassis.
17. Grasp the bus bar and pull the PDB/bus bar assembly to the left, away from the paddle card.
18. Lift the PDB/bus bar assembly up and out of the system.
19. Place the PDB/bus bar assembly on an antistatic mat.
20. Lower the PDB/bus bar assembly into the chassis.The PDB fits over a series of mushroom standoffs in the floor of the chassis.
21. Slide the PDB/bus bar assembly to the right, until it plugs into paddle card.
22. Install the five No. 2 Phillips screws to secure the PDB to the chassis.
23. Connect the top cover interlock cable to the power distribution board.
24. Connect the PDB ribbon cable to the PSU backplane.
25. Install the motherboard back into the system and tighten the 4 screws to secure the motherboard to the bus bar
26. Tighten the green captive screws to secure the motherboard to the chassis
27. Install the plastic air flow baffle between the fans and the motherboard
28. Install the processor heat sinks
29. Connect the PDB ribbon cable to PDB. Carefully connect the PDB ribbon cable to the motherboard.
30. Connect the hard drive data cables to the motherboard
31. Install the PCI riser boards and PCI cards
32. Install the air baffle
33. Install the power supplies
34. Replace the top cover
35. Re-connect the power cords

36. Verify serial number is shown at ilom level.

If not please update owning engineer to take steps to resolve this.

OBTAIN CUSTOMER ACCEPTANCE

WHAT ACTION DOES THE CUSTOMER NEED TO TAKE TO RETURN THE SYSTEM TO AN OPERATIONAL STATE:
Verify functionality, no service LEDs or messages. Verify via ipmitool output
Gather and upload explorer

PARTS NOTE:

REFERENCE INFORMATION:
Sun Fire x4250 Server Service Manual

5.5 Servicing the Power Distribution Board (PDB)

http://docs.oracle.com/cd/E19121-01/sf.x4250/820-4214-11/servicing-infrastructure.html#50651195_71558

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