Asset ID:	1-71-1008408.1
Update Date:	2010-10-01
Keywords:

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Solution Type  Technical Instruction Sure

Solution  1008408.1 :   Sun SPARC Enterprise T5120/T5220 Infrastructure Boards; removing a power supply [Video]  


PreviouslyPublishedAs
211492

Applies to:

Sun SPARC Enterprise T5120 Server
Sun SPARC Enterprise T5220 Server
All Platforms

Goal

The purpose of this article is to assist in  removing a power supply form
Sun SPARC Enterprise T5120/T5220 Servers

Video - T5120 T5200 PSU Removal (5:00)

Solution

The Sun SPARC Enterprise T5120/T5220 servers have the following circuit boards installed in the chassis:

- Motherboard

- Power distribution board (2 in the T5220)
 
- Paddle board

- Disk backplane
 
- USB board

- Fan boards (2)

- PCIe riser cards (3)

The motherboard is actually an assembly made up of the motherboard itself and a tray or carrier.
The motherboard assembly comes in several different versions, with the only difference being processor speed and the number of cores.

The motherboard includes a direct-attach CPU module, slots for 16 DIMMs, memory control subsystems, and all system controller (ILOM) logic.

In addition, a removable NVRAM contains all Mac addresses, host ID, and OpenBoot PROM configuration data. When replacing the motherboard, the NVRAM can be transferred to a new board to retain system configuration data.

The service processor (ILOM) subsystem contains a PowerPC Extended Core, and a communications processor that controls the host power and monitors host system events (power and environmental).

The ILOM controller draws power from the host s 3.3V standby supply rail, which is available whenever the system is receiving AC input power, even when the system is turned off.

The power distribution board distributes main 12v power from the power supplies to the rest of the system. It is directly connected to the paddle board, and to the motherboard through a bus bar.

The power distribution board distributes main 12v power from the power supplies to the rest of the system. It is directly connected to the paddle board, and to the motherboard via a bus bar and ribbon cable.

The paddle board is an assembly made up of the board, a metal mounting bracket, and a top cover interlock or kill switch.

The paddle board serves as the interconnect between the fan connector boards, and SAS backplane.
The disk backplane includes the connectors for the SAS drives, as well as the interconnect for the USB board, Power and Locator buttons, and system/component status LEDs.

There are two different SAS backplanes, depending on the server form factor:

1U - Four-disk backplane
2U - Eight-disk backplane

The USB board connects directly to the SAS backplane. It is packaged with the DVD drive as a single customer-replaceable unit (CRU).

The fan boards carry power to the system fan modules.

In addition, they contain fan module status LEDs, and transfer I2C data for the fan modules.

Note: The fan boards in the Sun SPARC Enterprise T5120 and T5220 are different boards, but function the same.

There are three PCI riser cards per system, each attached in slots to the rear of the motherboard.

In 1U systems, each riser card supports one card.
In 2U systems, each riser supports two cards.

PCI riser cards come in 2 different versions.

One that can support both the x8 PCIe card or an XAUI card, and
One that supports x16 PCIe.

Slots on the motherboard are keyed so that you can only plug in the correct type of riser card into the motherboard. Note: The slots that you see on the motherboard are not industry standard PCI-E slots. They are Sun proprietary slots that only accommodate the Sun riser cards.

infrastructure boards, removing power supply
Previously Published As
91562

Change History
Date: 2009-11-19
User name: Dencho Kojucharov
Action: Updated
Comments: Currency check, audited by Dencho Kojucharov, Entry-Level SPARC Content Lead
Date: 2007-12-18
User Name: 71396
Action: Approved
Comment: Publishing VT related infodoc
Version: 1
Date: 2007-12-18
User Name: 71396
Action: Created
Comment:
Version: 0


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