DS8000 Service Documentation Version 7.5

Exchange the I/O enclosure backplane assembly

Before you begin

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

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.

About this task

Note: The I/O enclosure must be fully removed from the rack for this procedure.

Remove the I/O enclosure backplane assembly

Before you begin

Note: You need 5.5 mm and 8 mm sockets to remove hex head screws for this FRU.

Procedure

  1. To locate this FRU, do one of the following and then return here and continue to replace the FRU:
    • If this FRU has a FRU identify indicator, use the FRU identify indicator, which is listed in MAP1240 Locating FRUs using identify indicators. If not, use the location code.
      Note: There might be cases where the FRU failure or fencing conditions prevent the FRU LED indicator from being lit even if the FRU has power.
    • Use the location code, which is listed in MAP1245 Finding FRUs by using location codes.
    • If there is no FRU identify indicator or location code, you were sent here by an isolation MAP or symbolic FRU procedure. Use the information in that procedure and the figures in this procedure to locate the proper part to exchange.
  2. Most, but not all, FRUs have identify indicators. Use the flashing amber or solid blue FRU identify indicators to ensure that you are working on the correct enclosure or FRU.
    • The "light path" identify LEDs are a hierarchy of LEDs that can identify the rack, enclosure, FRU, and even the FRU connector to which a cable is connected.
    • For more information, refer to MAP1240 Locating FRUs using identify indicators.
  3. If the front of the I/O enclosure to be repaired is blocked by the HMC you are using, do the following. See Figure 1.
    1. Move the management console laptop from the standard service position Callout label 2 to the alternate service position Callout label 1. Refer to Management console service positions (Model 961).
    2. Push the now empty management console tray Callout label 2 fully into the rack. This allows access to the top and rear of the I/O enclosures.
    Figure 1. Alternate service position
    Alternate service position
  4. At the front of the rack, for the I/O enclosure being repaired, unplug the power input cable Callout label 1 to each power supply. See Figure 2.
    Figure 2. I/O enclosure power supply, input power connectors
    I/O enclosure power supply, power connector, and handle
  5. Remove both power supplies.
    1. Remove the I/O power supply retention bracket Callout label 1 by removing the screws on either side of the bracket Callout label 2. See Figure 3.
      Figure 3. I/O enclosure power supply retention bracket
      I/O enclosure power supply retention bracket
    2. Push down on the red release button Callout label 1 beneath the input power connector. See Figure 4.
      Figure 4. I/O enclosure power supply, input power connector release button
      I/O enclosure power supply, input power connector release button
    3. Pull the power supply straight out from the I/O enclosure.
  6. Remove both fan assemblies. See Figure 5.
    1. Unlatch the orange fan release lever Callout label 1 in the upper right corner of the fan. Then, use it to pull the fan assembly straight out from the I/O enclosure.
      Figure 5. Removing the I/O enclosure fan
      Removing the I/O enclosure fan
  7. At the rear of the rack, unlatch Callout label 1 and pull Callout label 2 the I/O enclosure PCIe / SPCN card out about 2.5 cm or 1 inch. See Figure 6.

    You can leave the cables attached but you might need to unplug one or more cables to gain access to the blue lever latch.

    Note: Undocking these cards will make it easier to slide the I/O enclosure planar assembly out the front later in this procedure.
    Figure 6. PCIe / SPCN card latch
    PCIe / SPCN card latch
  8. Unlatch Callout label 1, as shown in Figure 7 (Model 941) and Figure 8 (Model 951), and slide each device adapter card and host adapter card out about 2.5 cm or 1 inch. Leave the cables attached.
    Note: Undocking these cards will make it easier to slide the I/O enclosure planar assembly out the front later in this procedure.
    Figure 7. I/O enclosure device adapter card, copper (4-port), blue retention levers
    I/O enclosure device adapter card, copper (4-port), blue retention levers
    Figure 8. I/O enclosure device adapter card, optical (4-port) blue retention levers
    I/O enclosure device adapter card, optical (4-port) blue retention levers
  9. At the front of the rack, unscrew the two thumbscrews that fasten the planar assembly to the I/O enclosure midplane sheet metal.
    1. When you removed each power supply, a sheet metal flapper door pivoted down to block off the opening.
    2. Lift each door up and then reach through and unscrew the two thumbscrews. They are captive and will not fall off.
  10. At the front of the rack, remove the hold down bracket below the affected I/O enclosure by removing the two screws at either end of the bracket. Callout label 1 for the upper enclosures (rB1, rB2) or Callout label 2 for the lower enclosures (rB3, rB4). See Figure 9.
    Figure 9. I/O enclosure hold down brackets
    I/O enclosure hold down brackets
  11. Use the brackets Callout label 1 to pull the planar assembly out. See Figure 10.
    Note: The rubber air seals can make the planar assembly hard to pull out.
    Figure 10. I/O enclosure backplane assembly screws and brackets details
    I/O enclosure backplane assembly screws and brackets

Install the I/O enclosure backplane assembly

Procedure

  1. At the front of the rack slide the I/O enclosure backplane assembly in by pushing on the two brackets Callout label 1, as shown in Figure 10.
  2. Lift up the power supply sheet metal flapper doors and screw in the two thumbscrews.
  3. Install the hold down bracket below the affected I/O enclosure, Callout label 1 for the upper enclosures (rB1, rB2) or Callout label 2 for the lower enclosures (rB3, rB4). See Figure 9.
  4. Install the two power supplies. Ensure that the red latch beneath the input power connector is secure.
  5. Reinstall the I/O power supply retention bracket Callout label 1, as shown in Figure 3.
  6. Install and latch the two fans.
  7. At the rear of the rack, fully install and latch the device adapter and host adapter cards.
  8. Fully install and latch the PCIe / SPCN card.

    Connect any cables disconnected from the PCIe / SPCN card.

  9. At the front of the rack, connect the power input cable to each power supply.
  10. If you moved the management console to the alternate service position, return it now to the standard service position.
  11. Exit this service information center parts exchange procedure and return to the procedure that sent you here.