Replacing a system processor module in a 8335-GTW or 8335-GTX system

To replace a system processor module, complete the steps in this procedure.

1. Ensure that you have the electrostatic discharge (ESD) wrist strap on and that the ESD clip is plugged into a ground jack or connected to an unpainted metal surface. If not, do so now.
2. Remove dust and debris from the system processor socket area.
   If dust or debris is present, use the supplied air pump to clean the system processor socket area.
3. Prepare the system processor module for installation:
   1. Open the latches that hold the system processor module in the supplied removal tool (A). Push down on the ring (B) while pressing in on the tabs (C).
      See Figure 1.

      

   2. Lower the tool over the system processor module while ensuring that the two guide pins (A) insert into the alignment holes (B) on each side of the tool.
      See Figure 2.

      

   3. With the removal tool sitting on top of the system processor module, push down on the ring (A) to close the latches (C) and lock the system processor module into the tool. Make sure that both of the tool jaws are locked on the system processor module.
      See Figure 3.

      

4. Hold the sides of the tool with system processor module and carefully lift the tool out of the system processor module tray.
5. Install the system processor module:
   1. If dust or debris is present on the system processor socket, use the supplied air pump to clean the socket. Blow small bursts of air from the center toward the sides of the socket, as shown in Figure 4.

      

   2. Lower the tool and system processor module onto the socket. Align the guide pins (A) with the alignment holes (B) on each side of the tool. Use care to lower the tool evenly without tilting the tool.
      See Figure 5.

      Note: Do not attempt to slide the tool and the system processor module in any direction while the system processor module is touching the socket. If the tool and the system processor module are not aligned with the guide pins, lift the tool and the system processor module and reposition them.

      

   3. Open the latches that hold the system processor module in the supplied removal tool (A). Push down on the ring (B) while pressing in on the tabs (C).
      See Figure 6.

      

   4. Lift the tool off the system processor module.
6. Inspect the thermal interface material (TIM) for visible signs of damage, as shown in Figure 7. If you see folds, tears, bends, or if you have doubts about the TIM, replace it.

   

7. Choose one of the following repair options:

   Option	Description
   Is the TIM damaged?	It is damaged. Proceed to step 8 to replace the TIM and install the cold plate.
   Is the TIM OK?	It is not damaged and can be reused. Proceed to step 9 to move the TIM and install the cold plate.

8. Use this step to install a new TIM and reuse the existing heat sink.
   1. Open the TIM packaging and carefully remove the TIM, holding it by the edges of the carrier strip and holding it away from the shipping container.
   2. Remove the protective film from the clear carrier strip by using the supplied tweezers.
      Note: The TIM must remain flat. Small wrinkles are acceptable, but folds are not acceptable.
   3. Using the tweezers, remove the TIM from the carrier strip and center it onto the system processor module.
      The TIM has no preferred up side. The TIM can be placed on the system processor module and centered as shown in Figure 8.

      

   Continue with step 10.

9. Use this step to reuse the existing undamaged TIM and heat sink.
   1. Using the tweezers, move the old TIM from the clean, dry surface and center it onto the new system processor module.
      The TIM has no preferred up side. The TIM can be placed on the system processor module and centered as shown in Figure 9.

      

10. Install the cold plate.
    1. Remove the protective cover (B) from the cold plate (A) as shown in Figure 10.

       

    2. Using the alignment pins, carefully place the cold plate straight down onto the system processor module.
    3. Maintain slight downward pressure on the coldplate to ensure that it and the system processor module do not move.
    4. Tighten the cold plate retainer screw with the supplied hex key as shown in Figure 11.

       

11. Replace the air baffles (A) and (B) as shown in Figure 12.
    Carefully move the baffles around the hoses.

    

12. Lightly grip the system processor module that you replaced by the edges and lift it off the packaging cover. Align the beveled corner of the module (A) to the corner of the packaging with triangle (B) and place it in the packaging, as shown in Figure 13. Close the packaging cover.