What should I do about my Ultra-1's CPU cooling fan?
The small five or seven-blade fan that sits on the Ultra-1 CPU heat sinkfails over time. Only the Ultra-1 is affected. This known problem is
fixed by Field Change Order FCO #A0089-1, which replaces the CPU cooling
fan with a better one. Call Sun (in the US, 800-872-4786, and in Canada,
800-722-4786) with the Ultra-1's serial number and Sun will ship a fan
free. If you have more than one Ultra-1, ask for several fans.
The CPU cooling fan part number is 540-2761. Note that some Sun Spares
Reference Guides indicate that it is the fan for the front of the cabinet,
which is incorrect.
Replacement Technique:
1. Move Power Supply.
(a) loosen 2 screws near power connection
(b) slide power supply forward and lift out of way.
2 Loosen 4 screws around fan and slide fan out into space that was
occupied by power supply. Be sure to open the connector latch. If you
pull too hard, the socket comes off the motherboard too.
Thanks to Greg Polanski
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