Mx-32 - How to replace a Faulty Power Bus Bar Connector (Crown Clip)

Asset ID:	1-71-1547864.1
Update Date:	2016-01-20
Keywords:

Solution Type Technical Instruction Sure

Solution 1547864.1 : Mx-32 - How to replace a Faulty Power Bus Bar Connector (Crown Clip)

Applies to:

Oracle SuperCluster M6-32 Hardware - Version All Versions and later
SPARC M6-32 - Version All Versions and later
SPARC M5-32 - Version All Versions and later
Information in this document applies to any platform.

Goal

CAP PROBLEM OVERVIEW: Mx-32 - How to replace a Faulty Power Bus Bar Connector (Crown Clip)

To report errors or request improvements on this procedure, please go to My Oracle Support, and put a comment on Doc ID: 1547864.1

This Canned Action Plan describes all necessary steps to replace one or more Faulty Power Bus Bar Connectors (Crown Clips) , which are described in great detail in the SPARC M5-32 Server Service Manual, Servicing Bus Bars.

ESD Caution:

Circuit boards and drives contain electronic components that are extremely sensitive to static electricity. Ordinary amounts of static electricity from clothing or the work environment can destroy the components located on these boards. Do not touch the components along their connector edges.
Use a Antistatic Wrist strap. Attach one end of the strap to your wrist and the other end to the chassis, depending on what type of strap you use, with the adhesive end or the metal plug.
Use an Antistatic Mat. Place ESD-sensitive components such as motherboards, memory, and other PCBs on an antistatic mat.

Contamination Caution:

Dust particles of packaging material are number one cause of datacenter contamination. Make sure to remove all packaging material, up to the ESD safe packaging material, while still being outside the datacenter.

NOTICE: The component specified for replacement in this action plan requires a Genie Lift. The lift is required not only for the safety of the servicing engineer, but also for the successful implementation of the replacement procedure. Any of the following parts may be ordered to satisfy the Genie Lift requirement:

370-4286 Genie Lift w/straddle base.
371-4170 Genie Lift w/Cntr-weight Base Adj
370-6889 Genie Lift w/counter-weight base
370-6888 Genie Lift w/standard base

Depending on the region/country, the order lead-time for the Genie Lift may be longer than other parts.

DO NOT ATTEMPT THE REPLACEMENT PROCEDURE WITHOUT THE REQUIRED GENIE LIFT.

Solution

DISPATCH INSTRUCTIONS

WHAT SKILLS DOES THE ENGINEER NEED: Mx-32 Product Training/Experience

TASK COMPLEXITY: 4

TIME ESTIMATE: 180 minutes COLD replacement

FIELD ENGINEER INSTRUCTIONS

WHAT STATE SHOULD THE SYSTEM BE IN TO BE READY TO PERFORM THE RESOLUTION ACTIVITY? :

Physical Domains must be shut down. Server must be powered off.

WHAT ACTION DOES THE ENGINEER NEED TO TAKE:

Caution:

The empty power system cage weighs 207 lbs (94kg). Two Oracle engineers are required to move it.
A lifting device like a Genie Lift is needed during removal/insertion of the power system cage
During the repair of one or more Power Bus Bar Connectors, prepare ESD safe storage space for 2 Power Signal System Distribution boards, 12 Power Supplies, 1 Front Filler panel and 1 Power System Cage
Record the slot number for each component, and stack them in order. You must place them back in their original order later

At this point you should know which Power Supply is having an issue with its Faulty Power Bus Bar Connector:

behind each Power Supply there are three pairs of vertical bus bars
each bus bar has a Power Bus Bar Connector that connects to the Power Supply
for the given problematic Power Supply, up to 6 Power Bus Bar Connectors can be damaged
the 12 power supplies (4 rows of 3 PS) number left to right, bottom to top
there are 12 groups of 6 Power Bus Bar Connectors
with the PS number , you can identify which group of 6 Power Bus Bar Connectors you need to focus on

1. Check your repair kit does include:

mechanical lifting device also known as Genie Lift
torque screwdriver
crown clips (6)
T20 screws (12 long and 12 short)
disposable tie wraps (25 small and 25 large)
all unused parts, lift and torque driver must be returned to Oracle

2. Halt the server and turn off all AC power:

Turn the key switch on the Front Panel of the server to the Service position.
Gracefully shutdown the server by running the ILOM command "stop /System" (requires Oracle ILOM Reset and Host Control (r) user role).
Turn off all external breakers for the server.
For maximum safety, disconnect all six power cords from their respective AC outlets.

3. Verify that it is safe to disconnect the power cords:

All six external breakers for the server must be in the Off position.
All six power cords for this server must be unplugged from their respective AC outlets.
No LEDs on the server should be lighted.
You should not hear any fans running in the server.

4. Remove the front filler panel to access the power system cage, check M5-32 How to Service the Front Filler Panel Assembly [ID 1539427.1] for details

5. Remove both Power Signal Distribution boards (PSDBs) from the Power System Cage, check M5-32 - How to Replace a Faulty Power Signal Distribution Board (PSDB) [ID 1528156.1] for details

6. Remove all 12 Power Supplies from the Power System Cage, check M5-32 How to replace a Faulty Power Supply [ID 1530037.1] for details

7. At the rear of the server, disconnect all six AC line filters from the rear of the power system cage:

use a T20 Torx screwdriver to loosen two captive screws from an AC input filter
pull the AC filter out of the slot approximately 2 inch (50 mm)

8. Prepare for removal, and remove the Power System Cage from the server:

place the Genie Lift under the power system cage to support it
remove eight T20 Torx screws from the front of the power system cage
use the lifting device to carefully pull the power system cage out of the server, until it hits the locks on the sides of the power system cage
press the lock buttons on the upper sides of the power system cage to unlock them, then remove the power system cage from the server
place the removed Power System Cage on an ESD safe surface

9. Based on the problematic Power Supply number, you now can determine which group of 6 Power Bus Bar Connectors needs to be replaced

10. Replace each Power Bus Bar connector (Crown Clip) on the 3 blue negative bus bars for this Power Supply:

remove four Torx screws
install the new crown clip using four short Torx screws (0.625 in/16 mm)
use the torque screwdriver to tighten the screws to 10 in-lb

Note that the red positive bus bar requires a spacer block for each crown clip.

11. Replace each Power Bus Bar connector (Crown Clip) on the 3 red positive bus bars for this Power Supply:

remove four T20 Torx screws and the spacer block behind the crown clip
install the new crown clip using the original spacer block and four long Torx screws (1.625 in/41 mm)
use the torque screwdriver to tighten the screws to 10 in-lb

12. Prepare for installation, and install the Power System Cage into the server:

lift the replacement Power System Cage from the ESD safe surface, using the Genie Lift
carefully push the power system cage into the server
shoulder areas on the sides of the power system cage fit into openings at the sides of the cabinet
tighten eight T20 Torx screws at the front of the power system cage

13. Install all 12 Power Supplies into the Power System Cage, check M5-32 How to replace a Faulty Power Supply [ID 1530037.1] for details

14. Install both Power Signal Distribution boards (PSDBs) into the Power System Cage, check M5-32 - How to Replace a Faulty Power Signal Distribution Board (PSDB) [ID 1528156.1] for details

15. At the rear of the server, reconnect all six AC line filters to the rear of the power system cage:

push the AC filter fully into the slot
use a T20 Torx screwdriver to tighten the two captive screws

16. Install the front filler panel back into the power system cage, check M5-32 How to Service the Front Filler Panel Assembly [ID 1539427.1] for details

17. Verify all six external breakers are still in the Off position.

18. Warn bystanders that you are preparing to restart the server.

19. Turn on all AC power and start the server:

Connect all six AC cords to their respective AC outlets.
Turn on all external breakers for the server.
Turn the key switch on the Front Panel of the server to the On position.
Start the server by running the ILOM command "start /System" (requires Oracle ILOM Reset and Host Control (r) user role).

20. Prepare the failed Power Bus Bar connectors outside the datacenter for return to Oracle. Do return the Genie lift and torque driver too.

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