IBM 8681 Hardware Maintenance Manual - Page 163

Installing an optional processor daughterboard and cache coherency filter cards: To install an optional processor daughterboard and the cache coherency filter cards: Attention: Do not lift the processor housing assembly by the latches 8 . 1. If you have not already removed the processor housing assembly, do so now. Perform step 1 on page 149 through step 7 on page 150 and steps 1 and 2 on page 151; 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. Remove the empty processor cage 5 : a. Squeeze and slide out the release latches 1 as far as they will go, until they reach the unlocked position; then, release. b. Lift the empty processor cage out of the processor housing assembly, and remove the spacers 6 . Note When you are removing the processor cage from the processor housing assembly, be sure that the processor cage release latches remain in place. Store the spacers in a safe place for future use. 4. Remove the fan guard 9 : a. Remove the two screws from the sides of the fan guard. b. Lift the fan guard off the processor housing assembly. c. Rotate the fan guard away from the processors. d. Slide the fan guard toward the processors to remove the tabs on the bottom of the fan guard from the slots. Do not disconnect the power cables. 5. Install the two cache coherency filter cards in the two adjacent, vertical slots between the two processor daughterboards on the processor controller board. For location, see "Processor-controller board component locations" on page 140. 6. Reinstall the fan guard: a. Ensure that the power cables are routed over the top of the retainer bracket that holds the two cache coherency filter cards in place. b. Slide the tabs on the bottom of the fan guard into the slots. c. Place the fan guard on the processor housing assembly. Netfinity 8500R - Type 8681 155