DS8000 Service Documentation Version 7.5

Exchange the CEC enclosure memory module

Before you begin

Icon for electrostatic discharge wrist strapUse approved ESD procedures to prevent damage.

Attention:
  • This is not a stand-alone procedure. Customer disruption and damage to the hardware might occur if microcode and power boundaries are not in the proper conditions for this service action.
  • If you were sent here by a serviceable event FRU repair, the microcode and power boundaries have already been set.
  • If you were not sent here by a serviceable event FRU repair, see MAP1230 Replace a FRU without using a serviceable event.
Notes:
  • All the cables and FRUs to be removed must be uniquely identified so they can be reinstalled correctly.
  • If an installed earthquake resistance kit prevents you from accessing this FRU, refer to MAP1600.
Related tasks:
How to start the service information center

Remove the CEC enclosure memory module

Procedure

  1. Use a replacement part with a valid DS8000® part number to ensure it has the proper firmware, VPD, and/or configuration to ensure it is compatible with the DS8000 service procedures. Attempting to use a generic POWER7® server FRU might fail and require next level of support to recover.
  2. All parts being removed must be marked or identified so they can be installed into their original locations.
    Note: Failure to do this can extend the service duration and may require next level of support assistance.
  3. If the CEC enclosure to be repaired is beneath the management console you are logged into:
    1. Move the management console laptop from the service position Callout label 2 to the DC-UPS service position Callout label 1, as shown in Figure 1. Refer to Management console service positions (Model 961).
    2. Push the now empty management console tray Callout label 2 fully into the rack. See Figure 1. This allows access to the top and rear of the CEC enclosure.
    Figure 1. Management console Battery service module (BSM) Set service position
    Alternate service position
  4. Use the CEC enclosure front and rear blue identify LEDs to determine the CEC enclosure to be repaired. Both blue LEDs should be solidly lit.
    • CEC control panel blue identify LED Callout label 1, as shown in Figure 2.
    • CEC enclosure rear blue identify LED Callout label 2, as shown in Figure 2.
    Note: If both the front and rear CEC enclosure identify LEDs are not lit, use the location code listed in the serviceable event FRU list. See MAP1245 Finding FRUs by using location codes.
    Figure 2. CEC identify blue LEDs, front and rear
    CEC identify blue LEDs, front and rear
  5. Verify the CEC enclosure is in the power-off state. See Figure 3.
    1. At the rear of the CEC enclosure, view both CEC enclosure power supply DC GOOD LEDs.
    2. Are both DC GOOD (output) LEDs Callout label 2 blinking?
    Figure 3. CEC enclosure power supply LEDs (Model 961)
    CEC enclosure power supply LEDs (Model 961)
  6. Disconnect the power cables (E1-J1 and E2-J1) from the CEC with the DC Good LEDs blinking. See Figure 4.
    Note: The CEC enclosure power supply LEDs continue to blink for up to 20 seconds while internal power is discharged.
    1. Each power cable is looped once around the CEC enclosure power supply handle and secured with a cable tie.
    2. Remove the cable tie, unplug the cable and unwrap it from the handle.
    Figure 4. Location codes for the CEC enclosure (rear view) (Model 961)
    Location codes for the CEC enclosure (rear view) (Models 961)
  7. Observe the CEC enclosure control panel green power present icon Callout label B. See Figure 5.
    • If it is off, go to the next step.
    • If it is slow blinking, the CEC enclosure is still in the power-off state. DO NOT CONTINUE. Ensure that you have unplugged the power cables.
    Figure 5. CEC enclosure control panel
    CEC enclosure control panel
  8. At the front of the CEC enclosure, remove the two screws Callout label A (10 mm hex head) that secure the CEC enclosure Callout label B to the rack. See Figure 6.
    Figure 6. Preparing the CEC enclosure for service position
    Preparing the CEC enclosure for service postion
  9. Pull the CEC enclosure fully out to the service position.
    1. Hold the CEC enclosure release latches Callout label A down on both the left and right sides, and pull the CEC enclosure full out. See Figure 7.
    2. Ensure both slide rails both latch in the full out position.
    Figure 7. Pulling the CEC enclosure out to the service position
    Pulling the CEC enclosure fully out to the service position
  10. Remove the CEC enclosure service access cover. See Figure 8.
    1. Loosen the two thumbscrews Callout label A located at the back of the cover.
    2. Slide the cover toward the back of the CEC enclosure. When the front of the service access cover has cleared the upper frame ledge, lift the cover up and off the CEC enclosure.
    Figure 8. Removing the service access cover
    Removing the service access cover
  11. Remove the memory card. See Figure 9. Unlock the card latches Callout label A, lift them into the open position, and then lift the card out of the slot.
    Figure 9. Removing a memory card
    Removing a memory card
  12. Identify the failing memory module using one of the following methods:
    1. Use the location code from the serviceable event FRU list. (Figure 10)
    2. Pressing the blue button Callout label B on the memory riser. Doing this activates the LED Callout label A associated with the failing DIMM. See Figure 10 and Figure 11.
    Figure 10. Memory module locations on the processor card (Un-P2-Cx)
    Memory module locations on the memory card (Un-P1-Cx)

    (In Figure 11, Callout label C is the Identify/Fault LED for the memory card. See CEC enclosure LED indicators (Model 961) for more information.)

    Figure 11. Identifying the failing memory module
    Memory card and memory module LED indicators
  13. Unlock the memory module by pushing the locking tabs Callout label A open as shown in Figure 12. Lift the memory module Callout label B out of the connector. The lever action of the tabs forces the memory module out of the connector.
    Figure 12. Removing a memory module
    Removing a memory module

Install the CEC enclosure memory module

Procedure

  1. Install the memory module. See Figure 13.
    1. Ensure that the connector locking tabs Callout label A are pushed open into the unlocked position, as shown in Figure 13, before installing a new memory module.
    2. Carefully grasp the memory module along the edge Callout label B and align it with the connector.
      Attention: Memory modules are keyed to prevent a memory module from being installed incorrectly. Note the location of the key tab within the memory module connector before attempting to install the memory module.
    3. Push the memory module firmly into the connector until it locks.
    Figure 13. Replacing a memory module
    Replacing a memory module
  2. Install the memory card. See Figure 9.
    1. The memory card memory modules must face to the right. See Figure 14.
    2. Lift the card latches Callout label A into the open position, lower the memory card into the slot, and then close the card latches until they snap into place.
      Note: If the memory card memory modules face to the left, the card may feel properly installed, but it will not be seated in the system planar connector. See Figure 14.
      Figure 14. Correct orientation to install memory card
      Correct orientation to install memory card
  3. Install the service access cover. See Figure 8.
    1. Place the service access cover on top of the system, about 25 mm (1 in.) from the upper chassis ledge.
    2. Hold the service access cover against the system unit and slide it toward the front of the system. The tabs of the service access cover slide beneath the upper chassis ledge.
    3. Align the two thumbscrews Callout label A located on the back of the service access cover with the two holes on the back of the system chassis.
    4. Tighten the thumbscrews to secure the service access cover.
  4. Push the CEC enclosure fully into the rack until it latches in place.
  5. Install the screws that fasten CEC enclosure in place.
  6. Connect the power cables (E1-J1, E2-J1) to both CEC enclosure power supplies. See Figure 15.
    Note: The power supply "DC Good" green LED should blink. See Figure 3.
    1. Loop the power cable around the power supply handle and connect it.
    2. Secure the cable with the cable tie.

    Is the DC Good green LED blinking on one or both power supplies?

    • Yes, go to the next step.
    • No, ensure the power cables are properly connected. If no cable problem is found, call the next level of support.
    Figure 15. CEC enclosure power supply cable loops
    CEC enclosure power supply cable loops
  7. Wait up to 5 minutes for the CEC enclosure control panel green power present LED Callout label B to slow blink, as shown in Figure 5.
    Note: This ensures the CEC enclosure is in the power-off state.

    Is the green LED blinking?

    • Yes, go to the next step.
    • No, ensure the CEC enclosure power supplies are fully seated. The possible failing FRUs are the CEC enclosure system backplane, I2C interface card and cables, and control panel. You can also call the next level of support.
  8. Return the management console laptop to the standard service position Callout label B on the slide-out tray. See Figure 1.
    1. Slide the empty management console tray Callout label B out to the service position.
    2. Move the laptop assembly from the DC-UPS service position Callout label A to the standard service position Callout label B. Carefully route the cable bundle.
    3. Push the DC-UPS service position rails fully in.
  9. Exit this service information center parts exchange procedure and return to the procedure that sent you here.