A P P E N D I X A |
Field-Replaceable Units |
This appendix provides illustrated parts breakdown diagrams and a table that lists the server FRUs.
The following topic is covered:
FIGURE A-1, FIGURE A-2, and TABLE A-1 list the locations of the field-replaceable units (FRUS) in the server.
FRU Name[1] |
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The motherboard assembly is comprised of the following boards that must be replaced as a single FRU:
Note: This assembly is provided in different configurations to accommodate the different processor models (4, 6, and 8 core). |
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This board implements the system controller subsystem. The SC board contains a PowerPC Extended Core, and a communications processor that controls the host power and monitors host system events (power and environmental). The board holds a socketed EEPROM for storing the system configuration, all Ethernet MAC addresses, and the host ID. This board only draws power from the 3.3V standby supply rail, which is available whenever the system is receiving AC input power, even when the system is turned off. |
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Section 5.2.21, Removing the Battery on the System Controller |
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Provides the main 12V power interconnect between the power supplies and the other boards. |
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Cable replacement instructions are provided in the corresponding FRU procedures. |
Includes the following: bus bars, hard disk drive cable, motherboard I/O cable, PDB-I/O cable, PDB-DVD cable, front I/O board cable |
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The power supplies provide -3.3 Vdc standby power at 3 Amps and 12 Vdc at 25 Amps. When facing the rear of the system, PS0 is on the left and PS1 is on the right. |
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Contains the push-button circuitry and LEDs that are displayed on the front bezel of the chassis. |
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Houses the connectors and three amber LEDs for the fan assemblies. |
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The SAS backplane board contains the Molex connector for interfacing to 2.5 SAS or S-ATA disk drives. In addition, the board contains four seven-position vertical SAS connectors that bring each of the four SAS links from the I/O board. This board contains the electronic chassis serial number. |
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