Exchange the CEC enclosure memory voltage regulator module

Before you begin

CAUTION:
This assembly contains mechanical moving parts. Use care when you service this assembly. (C025)

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

Attention:
  • This procedure is not a stand-alone procedure. Customer disruption and damage to the hardware might occur when microcode and power boundaries are not in the proper conditions for this service action.
  • If a serviceable event FRU repair directed you to this procedure, the microcode and power boundaries are already set.
  • If a serviceable event FRU repair did not direct you to this procedure, 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.

Preparing the CEC enclosure to remove and replace the memory voltage regulator module

Procedure

  1. Use a replacement part with a valid DS8000® part number to ensure it has the proper firmware, VPD, or configuration to ensure it is compatible with the DS8000 service procedures. Attempting to use a generic 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. The management console keyboard can be moved between the operating and stowed position as needed to allow service clearance above the CEC enclosure.
  4. Use the front and rear blue identify LEDs to determine the CEC enclosure to be repaired. Both blue LEDs should be lit.
    • CEC control panel blue identify LED Callout label B as shown in Figure 1.
    • CEC enclosure rear blue identify LED Callout label 1 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 1. Control panel LEDs
    Control panel LEDs
    Figure 2. CEC enclosure rear LEDs
    Service indicator LEDs
  5. Verify that the CEC enclosure is in the power-off state. See Figure 3
    1. At the rear of the CEC enclosure, view all CEC enclosure power supply DC LEDs.
    2. Are all DC (output) LEDs flashing?
    Figure 3. Location of the power supplies and LEDs (Model 982)
    Location of the power supplies and LEDs (Model 982)
  6. Attach the electrostatic discharge (ESD) wrist strap.
    Attention:
    • Attach an electrostatic discharge (ESD) wrist strap to an unpainted metal surface of your hardware to prevent the electrostatic discharge from damaging your hardware.
    • When using an ESD wrist strap, follow all electrical safety procedures. An ESD wrist strap is used for static control. It does not increase or decrease your risk of receiving electric shock when using or working on electrical equipment.
    • If you do not have an ESD wrist strap, just before removing the product from ESD packaging and installing or replacing hardware, touch an unpainted metal surface of the system for a minimum of 5 seconds.
  7. Disconnect the power cords Callout label B from the CEC with the DC (output) LEDs flashing. See Figure 4.
    Notes:
    • Ensure the power cords are correctly labeled.
    • The power supply LEDs might continue to flash for up to 20 seconds while internal power is discharged.
    • The power cord is fastened to the system using the hook-and-loop fastener Callout label A. Unstrap the fastener to allow the enclosure to be placed in the service position.
    Figure 4. Removing the power cords (Models 982, 988)
    Removing the power cords (Model 982)
  8. Observe the CEC enclosure control panel green power button LED Callout label A. See Figure 5.
    • If it is off, go to the next step.
    • If it is flashing, the CEC enclosure is still in the power-off state. DO NOT CONTINUE. Ensure that you have unplugged the power cables.
    Figure 5. Control panel LEDs
    Control panel LEDs
  9. Disconnect all remaining cables from the rear of the CEC enclosure. See Table 1 and Figure 6.
    Table 1. CEC enclosure cable connections
    Connection Description
    P1-C2-T1, P1-C2-T2 PCIe to I/O enclosures (if C2 present)
    P1-C3-T1, P1-C3-T2 PCIe to I/O enclosures (if C3 present)
    P1-C5-T4 (HMC port 1) FSP Ethernet
    P1-C5-T5 (HMC port 2) FSP Ethernet
    P1-C6-T1, P1-C6-T2 i2c to RPCs
    P1-C7-T1, P1-C7-T2 RS485 to RPCs
    P1-C8-T1, P1-C8-T2 PCIe to I/O enclosures
    P1-C10-T1, P1-C10-T2 PCIe to I/O enclosures
    P1-C11-T1, P1-C11-T2 LPAR Ethernet
    P1-C11-T3, P1-C11-T4 Customer network (optional feature, if used)
    P1-C12-T1, P1-C12-T2
    P1-C12-T3, P1-C12-T4    		 Customer network (optional feature, if used)
    Figure 6. CEC enclosure location codes (rear view) (Model 982)
    CEC enclosure location codes (rear view) (Model 982)
  10. Remove the front cover.
    CAUTION:
    A hot surface nearby.
    1. Ensure that you have the electrostatic discharge (ESD) wrist strap attached. If not, attach it now.
    2. Place your fingers on the indentations and pull the latches Callout label B located on both sides of the cover.
    3. Pull the cover Callout label A away from the system.
    Figure 7. Removing the front cover
    Removing the front cover
  11. Place the CEC enclosure into the service position.
    Note:
    • When placing the enclosure into the service position, ensure that all stability plates are firmly in position to prevent the rack from toppling.
    • Ensure that only one enclosure is in the service position at a time.
    • Ensure that the cables at the rear of the system unit do not catch or bind as you pull the system unit forward in the rack.
    • When the rails are fully extended, the rail safety latches lock into place. This action prevents the system from being pulled out too far.
    1. Remove the shipping screws, if they are not removed already.
    2. Release the side latches Callout label A by pressing them downward and then outward as shown in Figure 8.
    3. Slide out the system unit Callout label B from the rack.
    Figure 8. Placing the enclosure in service position
    Placing the enclosure in service position
  12. Remove the service access cover.
    1. Ensure that you have the electrostatic discharge (ESD) wrist strap attached. If not, attach it now.
    2. Push the release latches Callout label A in the direction shown.
    3. Slide the cover Callout label B off the system unit. When the front of the service access cover has cleared the upper frame ledge, lift the cover up and off the system unit.
    Figure 9. Removing the service access cover
    Removing the service access cover
  13. Remove the safety cover.
    1. Ensure that you have the electrostatic discharge (ESD) wrist strap attached. If not, attach it now.
    2. Loosen the thumbscrew Callout label A located at the rear of the cover, by turning it in the direction shown in Figure 10.
    3. Slide the safety cover Callout label B toward the rear of the system. When the front of the cover has cleared the upper frame ledge, lift the cover up and off the system.
    Figure 10. Removing the safety cover
    Removing the safety cover

Removing the CEC enclosure memory voltage regulator module

About this task

The system has two memory voltage regulator modules in slots P2-C9 and P2-C42.

To remove the CEC enclosure memory voltage regulator module, complete the following steps:

Procedure

  1. Ensure that you have the electrostatic discharge (ESD) wrist strap attached. If not, attach it now.
  2. Remove the memory voltage regulator module by pulling out the memory voltage regulator module from the slot by the blue tab Callout label A while supporting the bottom of the card. See Figure 11.
    Figure 11. Removing the memory voltage regulator module
    Removing the memory voltage regulator module

Replacing the CEC enclosure memory voltage regulator module

About this task

To replace the CEC enclosure memory voltage regulator module, complete the following steps:

Procedure

  1. Ensure that you have the electrostatic discharge (ESD) wrist strap attached. If not, attach it now.
  2. Install the voltage regulator module by completing the following steps:
    1. Place the memory voltage regulator module into the connector of the system backplane, as shown in Figure 12.
    2. Press down the memory voltage regulator module until it is firmly in place.
      Note:
      • While replacing the memory voltage regulator module, ensure that the green tab Callout label A is on the side of the voltage regulator module that is closest to the front of the system. This check ensures that the orientation of the voltage regulator module in the system is correct.
      • Check for the following events, to identify whether the voltage regulator module is installed backwards:
        • When the system is powered on, the system does not go to FSP Standby mode.
        • All the CEC fans flash the amber LEDs.
    3. Ensure that the blue tab Callout label B that extends above the memory voltage regulator module is moved toward the outside of the frame, and not toward the inside of the frame. If it is moved toward the inside of the frame, it can touch the adjoining card.
    Figure 12. Installing the memory voltage regulator modules
    Installing the memory voltage regulator modules

Preparing the CEC enclosure for operation after removing and replacing the memory voltage regulator module

About this task

To prepare the system for operation, complete the following steps:

Procedure

  1. Ensure that you have the electrostatic discharge (ESD) wrist strap attached. If not, attach it now.
  2. Replace the safety cover.
    1. Push the safety cover Callout label A toward the chassis.
    2. Tighten the thumbscrew Callout label B by turning it in the direction shown in Figure 37 to fix the safety cover to the chassis.
    Figure 13. Replacing the safety cover
    Replacing the safety cover
  3. Replace the service access cover.
    1. Slide the cover Callout label A onto the system unit.
    2. Close the release latches Callout label B by pushing them in the direction shown.
    Figure 14. Installing the service access cover
    Installing the service access cover
  4. Place the CEC enclosure into the operating position.
    CAUTION:

    Pinch hazard.

    1. Ensure that you have the electrostatic discharge (ESD) wrist strap attached. If not, attach it now.
    2. Unlock the blue rail safety latches Callout label A by lifting them upward.
    3. Push the system unit Callout label B back into the rack until both system unit release latches lock into position.
      Note: Slide the system unit slowly into the rack to ensure that your fingers do not get caught in the side rails.
    4. Secure the enclosure to the rack with screws, if screws were removed when preparing the enclosure for service.
    Figure 15. Placing the CEC enclosure into the operating position
    Placing the CEC enclosure into the operating position
  5. Replace the front cover.
    1. Ensure that you have the electrostatic discharge (ESD) wrist strap attached. If not, attach it now.
    2. Position the cover Callout label A on the front of the system unit so that the four pins Callout label B on the system match the four holes at the rear of the cover.
    3. Press the tabs Callout label C to snap the cover into position.
    Figure 16. Installing the front cover
    Installing the front cover
  6. Attach the electrostatic discharge (ESD) wrist strap.
  7. Reconnect all cables, except for power cords. See Table 2 and Figure 41.
    If optical Ethernet connections are used, use proper cleaning procedures.
    Important: The optical cable plugs (LC connectors) and ports (SFPs) must be cleaned before connecting them. Use cleaning tool 54Y4392 or IBM-approved alternative. After cleaning SFPs with the tool, use air bulb 45D2645 or IBM-approved alternative. For detailed procedures, refer to current DS8000 Info Alerts or contact your next level of support.
    Table 2. CEC enclosure cable connections
    Connection Description
    P1-C2-T1, P1-C2-T2 PCIe to I/O enclosures (if C2 present)
    P1-C3-T1, P1-C3-T2 PCIe to I/O enclosures (if C3 present)
    P1-C5-T4 (HMC port 1) FSP Ethernet
    P1-C5-T5 (HMC port 2) FSP Ethernet
    P1-C6-T1, P1-C6-T2 i2c to RPCs
    P1-C7-T1, P1-C7-T2 RS485 to RPCs
    P1-C8-T1, P1-C8-T2 PCIe to I/O enclosures
    P1-C10-T1, P1-C10-T2 PCIe to I/O enclosures
    P1-C11-T1, P1-C11-T2 LPAR Ethernet
    P1-C11-T3, P1-C11-T4 Customer network (optional feature, if used)
    P1-C12-T1, P1-C12-T2
    P1-C12-T3, P1-C12-T4    		 Customer network (optional feature, if used)
    Figure 17. CEC enclosure location codes (rear view) (Models 982, 988)
    CEC enclosure location codes (rear view) (Model 982)
  8. Reconnect the power cords Callout label A to the CEC enclosure. See Figure 42.
  9. Fasten the power cords to the enclosure using the hook-and-loop fasteners Callout label B.
    Figure 18. Connecting the power cords
    Connecting the power cords
  10. Verify that the CEC enclosure has power available. See Figure 43.
    1. At the rear of the CEC enclosure, view the CEC enclosure power supply DC LEDs.
    2. Are all DC (output) LEDs flashing?
      • Yes, continue with the next step.
      • No, ensure the power cords are properly connected. If no connection problem is found, contact your next level of support.
    Figure 19. Location of the power supplies and LEDs (Model 982, 988)
    Location of the power supplies and LEDs (Model 982)
  11. Wait up to 5 minutes for the CEC enclosure control panel power-button LED Callout label A to flash. See Figure 44.
    Note: This ensures the CEC enclosure is in the power-off state.

    Is the power-button LED flashing?

    • 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.
    Figure 20. Control panel LEDs
    Control panel LEDs
  12. Close the rear door of the rack.
  13. Exit this service information center parts exchange procedure and return to the procedure that sent you here.