Replacing the standard processor daughterboard - (NF 8500R - Type 8681)

Replacing the standard processor daughterboard

To replace the processor daughterboard in the standard processor cage:
Refer to the illustration that immediately precedes 'Installing an optional processor daughterboard and cache coherency filter cards' while you perform the steps in this section.
  -Attention- Do not lift the processor housing assembly by the latches.

1.  If you have not already removed the processor housing assembly, do so now.
    Perform step 1 through step 7 and steps 1 and 2; then, return here.
2.  If you have not already removed the processor-cage cover -1-, do so now.
    Rotate the four fasteners -2- to the unlocked position; then, lift the cover and set it aside.
3.  Open the latches at the top of the processor in connector A1, and remove the processor.
    Place it on a flat, static-protective surface.
    Repeat these actions for the remaining processors and terminator cards in the processor cage.
4.  Remove the processor cage:
   1.  Squeeze and slide out the release latches -10- as far as they will go, until they reach the  unlocked position; then, release.
       As they will go, until they reach the unlocked position.
   2.  Lift the processor cage out of the processor housing assembly, and place it on a flat, static-protective surface.

5.  If necessary, remove the processor-daughterboard extraction tool from processor cage A  (behind processor A4); then, place the processor-daughterboard extraction tool under and  against the processor daughterboard, as shown, in the area marked Use extraction tool here .
    
   
6.  Press the processor-daughterboard extraction tool downward to pivot and lift the processor  daughterboard; then, remove the processor daughterboard from the processor housing assembly.
7.  Remove the new processor daughterboard -7- from its static-protective bag.
8.  Align the processor-daughterboard connector with the keyed connector on the processor controller board.

   Note: For the location of the processor-daughterboard connectors on the processor controller board, see 'Processor-controller board component locations'.
    For a layout of the processor daughterboard, see 'Processor-daughterboard component locations'.

9.  Firmly press the processor daughterboard -7- down into the keyed connector on the processor controller board.
    Push in the center of the board, until the processor daughterboard is fully seated.
10.  Align the processor cage with its tabs over the corresponding slots on the processor daughterboard.  Match the labels on the processor cage with the corresponding labels on the fan guard -9-; for  example, A1/A1.
11.  Firmly press the processor cage down into the slots on the processor housing assembly, until the  processor cage is fully seated.
12.  Squeeze and firmly push the release latches -10- back into the locked position; then, release.

      -Attention- Ensure that the release latches are in the  fully locked position.

13.  Install processors -4- in the desired connectors, as described in step 3 through step 7; then, return here.
14.  Install terminator cards -3- in the connectors that do not contain processors.
     The arrows on the terminators must face toward the large connector on the processor housing assembly and away from the fan guard.
15.  If you removed the processor-daughterboard extraction tool in (above) step 5, replace the  processor-daughterboard extraction tool on processor cage A, behind processor A4.
     Otherwise, store the tool in a safe place for future use.
16.  Reinstall the processor-cage cover by performing steps 10 and 11.
17.  Reinstall the processor housing assembly as described in 'Reinstalling the processor housing assembly'.

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