Exchange the CEC enclosure service access cover power interlock switch

Before you begin

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.

Remove the CEC enclosure service access cover power interlock switch

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 slowly 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 service access cover.
    2. Slide the service access cover toward the back of the CEC enclosure. When the front of the service access cover has cleared the upper frame ledge, lift the service access cover up and off the CEC enclosure.
    Figure 8. Removing the service access cover
    Removing the service access cover
  11. Remove the service access cover power interlock switch. (Figure 9.)
    1. Pull the blue latch to the left Callout label B.
    2. Push the power interlock switch towards the rear until the keyhole slots come free of the mounting studs Callout label C.
    3. Unplug the power interlock switch cable from the system backplane Callout label A.
      Figure 9. Service access cover power interlock switch
      Service access cover power interlock switch

Install the CEC enclosure service access cover power interlock switch

Procedure

  1. Install the service access cover power interlock switch. (Figure 9.)
    1. Connect the power interlock switch cable to the system backplane Callout label A.
    2. Align the power interlock switch on them mounting studs. You will need to keep it pushed against the right sidewall.
    3. Pull the power interlock switch towards the front until the blue latch snaps into place.
  2. 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.
  3. Push the CEC enclosure fully into the rack until it latches in place.
  4. Install the screws that fasten CEC enclosure in place.
  5. Connect the power cables (E1-J1, E2-J1) to both CEC enclosure power supplies. See Figure 10.
    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 10. CEC enclosure power supply cable loops
    CEC enclosure power supply cable loops
  6. Wait up to 5 minutes for the CEC enclosure control panel green power present LED Callout label B to blink slowly, 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.
  7. 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.
  8. Exit this service information center parts exchange procedure and return to the procedure that sent you here.