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

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6. Remove the four screws that secure the drive cage and PCI support cage to
the chassis and set the screws in a safe place.
Important: When the screws are removed, the drive cage is not secure.
7. Disengage the two alignment pins on the drive cage from the chassis and the
PCI support cage.
8. Pull the drive cage away from the chassis and carefully set it on a clean work
surface.
Important: When the drive cage is removed from the chassis, the PCI support
cage is not secure.
9. Remove the PCI support cage from the chassis and set it aside.
10. Disconnect the speaker cable from the system board.
11. Slide the speaker out of the retaining hooks on the chassis and remove it from
the computer, making sure that the cable follows freely.
To install the speaker, reverse the preceding steps.
Note: When installing the drive cage, it might be easier to insert the top alignment
pin into the chassis first; then, slightly tilt the PCI support cage to insert the bottom
alignment pin.
Fan assembly
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 a rear fan:
1. Turn off the computer and attached devices; then, disconnect all power cords
and external cables.
Note: Removing a fan assembly might be easier if the computer is turned on its
side.
2. Remove the cover and support bracket (see “Replacing the side cover” on page
27 and “Replacing the support bracket” on page 29).
3. Disconnect the fan cable from the system board, making a note of where the
cable was connected for later installation.
Note: It is not necessary to remove the microprocessor board, if present.
However to reach the fan cable on the system board, it might be easier to use
an implement such as a flat-blade screwdriver to assist with disconnecting and
connecting the fan cable.
Chapter 5. Field replaceable units
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