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| Sun Fire X4470 Server ### Service Manual

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Chapter 5

## Servicing FRU Components

This chapter describes how to service field-replaceable units (FRUs). You must power down the system and remove the AC power cords before servicing all FRU components.

Note - Only authorized service personnel should service FRU components.

This chapter contains the following topics:

- 5.1 Servicing the CPU and Heatsink (FRU)

- 5.2 Servicing the Fan Board (FRU)

- 5.3 Servicing the Power Supply Backplane (FRU)

- 5.4 Servicing the Disk Drive Backplane (FRU)

- 5.5 Servicing the Motherboard (FRU)

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