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Loosen the screws in ascending alphabetical order (2a to 2h) as illustrated, and then remove the thermal fan
assembly.
When installing:
• Do not touch the areas marked
• Ensure that the fan connector is attached firmly.
• Each screw is marked with a number on the thermal fan assembly. When installing, follow the screw
number to tighten the screws in ascending numerical order; otherwise, the system board assembly might
be damaged.
• If you want to re-use the old thermal fan assembly, remove the thermal grease first, and then apply new
thermal grease to the thermal fan assembly, at an amount of 0.2 grams, before you attach it to the system
board. Either too much or too less application of grease can cause a thermal problem due to imperfect
contact with a component.
1180 System board, dc-in bracket, dc-in cable assembly, and base cover
assembly
Important notices for handling the system board
When handling the system board, read the following:
• The system board has an accelerometer, which can be broken when several thousands of G-forces are
applied.
a
and
b
in the following illustrations.
.
Chapter 9
Removing or replacing a FRU
95
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