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d. Hall sensor board (see Hall sensor board on page 39)
e. System board (see
System board on page 52)
Remove the heat sink:
1. Turn the system board upside down, with the rear toward you.
2. Following the 1 through 4 sequence stamped into the heat sink, loosen the four Phillips captive
screws (1) that secure the heat sink to the system board.
3. Remove the heat sink (2).
NOTE: Due to the adhesive quality of the thermal material located between the heat sink and
the system board components, it may be necessary to move the heat sink from side to side to
detach it.
NOTE: The thermal material must be thoroughly cleaned from the surfaces of the system board (1)
and the heat sink (2) each time the heat sink is removed. Replacement thermal material is included with
the heat sink and system board spare part kits.
Component replacement procedures
55