IBM IntelliStation A Pro 6224, Руководство по техническому обслуживанию и ремонту

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Microprocessor board
Note:
v
Read “Installation guidelines” on page 25.
v
Read Appendix B, “Safety information,” on page 117.
v
Read “Handling static-sensitive devices” on page 25.
Complete the following steps to remove the microprocessor board:
1. Turn off the computer and attached devices; then, disconnect all power cords
and external cables.
2. Turn the computer on its side so that it is lying flat, with the cover facing up.
3. Remove the cover and support bracket (see “Replacing the side cover” on page
27 and “Replacing the support bracket” on page 29).
4. Remove the air baffle.
5. Disconnect all cables from the microprocessor board.
6. Remove all DIMMs from the microprocessor board and set them in a safe,
static-protective place.
7. Remove the fan sink and microprocessor from the microprocessor board (see
“Microprocessor and fan sink” on page 72) and set them in a safe,
static-protective place.
Attention: Before attempting to remove the fan sink from the microprocessor,
be sure to read all the instructions at “Microprocessor and fan sink” on page 72.
8. Fully loosen the six captive screws connecting the microprocessor board to the
system board. Four of these screws also secure the fan sink retention module.
9. Disconnect the microprocessor board from the system board by grasping the
pull points on microprocessor board (at the two corners of the board nearest
Alignment
pins
Second-microprocessor
connectors
System
board
Alignment
holes
Microprocessor
board
Option screws
(captive)
Fan sink
retention module
Figure 37. Removing the microprocessor board
Chapter 5. Field replaceable units
75