Replacing the base function system backplane in the 5148-21L, 5148-22L, 8247-21L, 8247-22L, 8284-21A, or 8284-22A

Learn how to replace the base function system backplane that is part of a service action.

1. Ensure that you have the electrostatic discharge (ESD) wrist strap on and that the ESD clip is connected to an unpainted metal surface. If not, do so now.
2. Install the system backplane.
   1. Grasp the top guide rail (A) and lower the backplane into position while you are sliding it toward the rear as shown in Figure 1.
   2. Using a Phillips screwdriver, install and tighten four screws (B) to secure the backplane to the side of the chassis as shown in Figure 1.
      Figure 1. Installing the system backplane

      
   3. Using a Phillips screwdriver, install and tighten 12 screws to secure the backplane to the base of the chassis. See Figure 2.
      Figure 2. System backplane screw locations

      
3. Place the original system backplane on the packaging for the replacement system backplane FRU and place it near the system with the replacement system backplane.
4. Remove the system processor socket cover from the replacement system backplane.
   1. Grasp the socket cover tabs with the supplied cover removal tool (part number 00FX605). Squeeze the removal tool handles. Then, lift the cover straight up, as shown in Figure 3.
   2. Repeat step 4 for the remaining system processor socket cover.
   Figure 3. Removing the system processor socket cover

   
5. Remove dust and debris from the system processor socket area in the replacement system backplane.
   1. If dust or debris is present on the system processor socket, use the supplied air pump (part number 45D2645) to clean the socket. If your air pump is not assembled as shown in Figure 4, fasten the tip onto the bulb. Blow small bursts of air from the center toward the sides of the socket, as shown Figure 4.
   2. Repeat step 5 for the remaining system processor socket.
   Figure 4. Removing dust and debris from the system processor socket

   
6. Remove the heat sink from the original system backplane.
   1. Loosen the heat sink actuation screw by turning the supplied 5.5 mm nut driver (part number 43W3032) counterclockwise (A) until the screw becomes loose and moves freely as shown in Figure 5.
   2. Grip the heat sink (B) by the grooves on opposing sides and remove it by lifting straight up.
   3. Inspect the heat sink for any dust or debris on it. If you must remove dust or debris from the heat sink, it must be done in another room or greater than 25 feet (7.62 meters) away from work area.
   4. Place the heat sink upside down on an Electrostatic Discharge (ESD) surface.
   5. Repeat step 6 for the remaining heat sink.
   Figure 5. Removing the heat sink

   
7. Remove dust and debris from the system processor module area in the original system backplane.
   1. If dust or debris is present, use the supplied air pump (part number 45D2645) to clean the system processor module area. Blow small bursts of air from the center toward the sides of the system processor module as shown in Figure 6.
   2. Repeat step 7 for the remaining system processor.
   Figure 6. Removing dust and debris from the system processor module area

   
8. Prepare the system processor module for removal from the original system backplane.
   1. Using the supplied removal tool, align the beveled corner (A) of the tool over the beveled corner of the system processor module as shown in Figure 7.
   2. Lower the tool over the system processor module by ensuring the two guide pins (C) are inserted into the alignment holes (B) on each side of the tool.
      Figure 7. Lowering the removal tool onto the system processor module

      
   3. With the removal tool (A) sitting on top of the system processor module, push down on the tool to lock the system processor module into the tool, as shown in Figure 8. Make sure that both of the tool jaws are locked on the system processor module. Do not press the blue release tabs until directed to do so later.
      Note: The tool drops slightly when you push the tool down so that the jaws can grab the bottom of the system processor module.
      Figure 8. Locking the system processor module into the tool

      
9. Holding the outside of the tool, lift the tool and system processor module from the socket of the original system backplane. Then, turn it over so that the system processor module side is up.
   1. Ensure that both jaws (A) are firmly grabbing the system processor module, as shown in Figure 9.
      Note: If both jaws are not firmly grabbing the system processor module, press down on the corner of the system processor module closest to the jaw until it locks into place. Do not touch any part of the system processor module other than the corners.
   Figure 9. Preparing for system processor module installation

   
10. Install the system processor module into the replacement system backplane.
    1. Lower the tool and system processor module onto the socket. Align the beveled corner (A) of the tool with the beveled corner on the socket. Ensure that the two guide pins (C) are inserted into the alignment holes (B) on each side of the tool. Use care to lower the tool evenly without tilting the tool. See Figure 10.
       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.
       Figure 10. Installing the system processor module

       
    2. After the tool and system processor module holes and guide pins are properly aligned, squeeze and hold the two blue release tabs (A) together until a firm stop is reached, as shown in Figure 11. Then, lift the tool off the system processor module.
       Figure 11. Removing the system processor module tool

       
    3. Repeat step 8 through 10 for the remaining system processor module.
11. Inspect the thermal interface material (TIM) for visible signs of damage, as shown in Figure 12.
    Note: When the heat sink is removed from the system processor module of the original system backplane, the TIM should be adhered to the heat sink. Unless damaged, the TIM that is adhered to the heat sink can be reused. Replacing the TIM is optional and is only performed if the TIM is damaged. Do not reuse the removed heat sink if the TIM is damaged. Either discard the heat sink and the damaged TIM locally or return them to IBM based on part-order-form part status. It is recommended that a spare TIM and heat sink, part number 00FV742, be on hand when replacing the system processor module into the replacement system backplane.
    Figure 12. Inspecting the thermal interface material

    
12. Repeat step 11 for the remaining heat sink.
13. Are you replacing the TIM or heat sink?

    Yes:

    Continue with step 14.

    No:

    Go to step 15.

14. Install a new TIM pad:
    1. If the TIM or heat sink must be replaced, order part number 00E8868, heat sink and TIM.
    2. 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.
    3. 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.
    4. Using the tweezers, remove the TIM from the carrier strip and center it onto the system processor module with the black side facing up. If the replacement TIM has a red stripe, the side with the red stripe must be facing up. Align the beveled edges of the TIM and the system processor module (A), as shown in Figure 13.
       Figure 13. Installing the TIM onto the processor lid

       
15. Install the heat sink in the replacement system backplane:
    1. Lower the heat sink over the system processor module, ensuring that the two guide pins (B) are inserted into the alignment holes on each side of the tool, as shown in Figure 14.
    2. Ensure that the heat sink load arm is engaged.
       Note: If the load arm is not engaged, you must manually engage the load arm onto the heat sink while the load screw is being tightened. See Figure 15.
       Figure 14. Installing the heat sink

       
16. Secure the heat sink:
    1. Upon placing the heat sink on the system processor module, ensure that the heat sink load arm on the side of the heat sink becomes engaged, as shown in Figure 15.
    2. While you are holding the heat sink in place, use the supplied 5.5 mm nut driver (part number 43W3032) to tighten the heat sink actuation screw. Turn the screw clockwise a few turns.
    3. Is the load arm still engaged?

       Yes:

       Continue turning the actuation screw clockwise until a firm stop is reached. If a torque tool is available, tighten the screw to 2.5 nm.

       No:

       Unscrew the actuation screw. Hold the load arm onto the heat sink while you are tightening the screw until a firm stop is reached. If a torque tool is available, tighten the screw to 2.5 nm.

       Note: If during this step, the heat sink moves noticeably, it is likely that the load arm is not engaged. If the heat sink moves noticeably, unscrew the actuation screw and hold the load arm onto the heat sink while you are tightening the screw until a firm stop is reached. If a torque tool is available, tighten the screw to 2.5 nm.
    Figure 15. Securing the heat sink

    
17. Repeat step 15 and 16 for the remaining heat sink.
18. Replace the SAS cable guide by inserting the slots on the guide over the pins (B) on the chassis. Grasp the tab (A) of the guide and push the guide toward the rear of the system. Push the guide back until the slots are seated on the pins (B) and the tab (A) of the cable guide latches. See Figure 16.
    Figure 16. Replacing SAS cable guide

    
19. Replace the PCI adapter dividers.
    Note: One PCI adapter divider is unique. It has three light pipes and must be installed in the location between PCI adapter slots P1-C1 and P1-C2.
    1. Holding the top edge of the PCI adapter divider (A), align the divider with its slot in the system.
    2. Slide the divider toward the retention notches (B) as shown in Figure 17.
    3. Ensure that the tabs on the divider align with the notches (B) on the system chassis.
       Note: The light pipes below the light-pipe plate must fit through the holes in the plate.
    4. Press on the divider until the lower edge guide pin (C) slides into the slot to secure the divider.
    5. Repeat step 19 for all PCI adapter dividers that must be replaced.
       Figure 17. Replacing the PCI adapter dividers

       
20. Replace the PCI adapters. For instructions, see Replacing a PCI adapter with the power turned off.
21. Replace the memory modules. For instructions, see Replacing a memory module.
22. Replace the air baffle by lowering it into position as shown in Figure 18. Repeat step 22 for the remaining baffle.
    Figure 18. Replacing the air baffle

    
23. Reconnect the power distribution signal cable (A) to the rear of the power supply assembly and the system backplane connector. See Figure 19.
    Figure 19. Replacing the power distribution signal cable

    
24. Replace the system I/O card. For instructions, see Replacing the system I/O card with the power turned off.
25. If your system is an 8247-21L, replace the rear USB cable. For instructions, see Replacing the rear USB cable.
26. Reroute the front USB cable and reconnect it to the backplane, as shown in Figure 20.
    Figure 20. Reconnecting the front USB cable

    
27. Replace the VPD card. For instructions, see Replacing the vital product data card.
28. Replace the time-of-day battery. For instructions, see Replacing the time-of-day battery.
29. Complete the disk drive backplane installation.
    1. Using the ledge at the top of the disk drive backplane and facing towards the front of the system, replace the backplane by tilting it towards the rear and lowering it down into the chassis.
    2. Align the backplane cutouts with the tabs in the chassis to insert it into the system.
    3. Shift the backplane slightly to the left to secure it in place, as is shown in Figure 21.
    4. Carefully tighten each of the disk drive backplane's captive thumbscrews (A) until each one is secured to the system's chassis.
       Figure 21. Replacing the disk drive backplane

       
30. Reconnect the signal and control panel cables (A), and the power Y cable (B) to the disk drive backplane and the system backplane as shown in Figure 22.
    Figure 22. Reconnecting the power, signal, and control panel cables

    
31. Replace the PCIe3 x8 SAS RAID internal adapter 6 Gb. Do not connect the front SAS cables to the disk drive backplane now. For instructions, see Replacing the PCIe3 x8 SAS RAID internal adapter 6 Gb.
32. Reseat the front SAS cables into the guide block on the side of the chassis as shown in Figure 23.
    Figure 23. Reseating the front SAS cables

    
33. Reconnect the front SAS cables to the disk drive backplane as shown in Figure 24. Push the connector in until the connector latch clicks.
    Figure 24. Reconnecting the front SAS cables

    
    Notes:

    • If you have one PCIe3 x8 SAS RAID internal adapter (CCIN 57D7) in slot P1-C14 (base-storage feature), one SAS cable connects the lower disk drive backplane connector (J1) to the P1 connector on the adapter. A SAS cable connects the upper disk drive backplane connector (J2) to the P2 connector on the same adapter. See Figure 25.
      Figure 25. Reconnecting the SAS cable in a base-storage configuration

      
    • If you have two PCIe3 x8 SAS RAID internal adapters (CCIN 57D7) (split-disk feature), the short SAS cable connects the upper disk drive backplane connector (J2) to the P2 connector on the adapter in slot P1-C14. The long SAS cable connects the lower disk drive backplane connector (J1) to the P1 connector on the adapter in slot P1-C15. See Figure 26.
      Figure 26. Reconnecting the SAS cable in a split-disk configuration

      
    • For information about SAS cable part numbers, see 5148-21L, 5148-22L, 8247-21L, 8247-22L, 8284-21A, or 8284-22A system parts.
34. Remove any labels that are attached to the cables after they are attached to their appropriate connectors.
35. Replace the fan cage with the fans installed. For instructions, see Replacing a fan cage.