5-2 Sun Fire X4450 Server Service Manual • November 2009
5.1 Servicing the Fan Power Boards
You must remove both fan power boards to access the paddle card or to access the
drive data cables in the Sun Fire X4450 server.
Note – FRU: This field-replaceable unit should be replaced only by qualified service
technicians. Contact your Sun Service representative for assistance.
Caution – Ensure that all power is removed from the server before removing or
installing fan power boards. You must disconnect the power cables before
performing this procedure.
5.1.1 Removing a Fan Power Board
1. Power off the server.
See Section 2.4, “Powering Off the Server” on page 2-3.
2. Disconnect the power cord (or cords) from the power supply (or supplies).
See Section 2.4, “Powering Off the Server” on page 2-3.
3. Extend the server into the maintenance position.
See Section 2.5, “Extending the Server to the Maintenance Position” on page 2-5.
Note – If you are removing the fan power boards to access the paddle card or drives
cage, you must remove the server from the rack. See Section 2.6, “Removing the
Server From the Rack” on page 2-7.
4. Attach an antistatic wrist strap.
See Section 2.7, “Performing Electrostatic Discharge and Antistatic Prevention
Measures” on page 2-9.
5. Remove the top cover.
See Section 2.8, “Removing the Top Cover” on page 2-11.
6. Remove the fan modules.
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