Centerplane

Removing the Centerplane

1. Remove the panels covering the front of the chassis.

   Complete the steps in "Removing the Front and Side Panels".

2. Remove all the disk drives.

   See Chapter 8, Internal SCSI and FC-AL Devices for information on removing disk drives.

3. Remove the fan tray assembly.

   See "Fan Tray Assembly" for information on removing the fan tray assembly.

4. Remove the 15 screws on each side that secure the front chassis to the main chassis. See Figure E-11.

5. Remove the two screws on the top front corners that secure the front chassis to the main chassis. See Figure E-11.

6. Gently pull out the front chassis and set it aside.

7. Disconnect all the cables from the centerplane.

   1. Disconnect the media tray data and DC power cable assemblies.

      See "Media Tray Data and DC Power Cable Assemblies" for information on disconnecting these cables.

   2. Disconnect the key switch PWB centerplane cable assembly.

      See "Key Switch PWB Centerplane Cable Assembly" for information on disconnecting this cable.

      Figure E-11 Enterprise 3500 System Without the Front Chassis

      
      

8. Disconnect all the boards from the centerplane.

   See Chapter 3, CPU/Memory+ Boards and Components, Chapter 4, I/O+ Boards and Components, Chapter 5, Clock+ Board, and Chapter 6, Interface Board for information on removing the boards.

9. Disconnect the peripheral power supplies from the centerplane.

   See Chapter 7, Power Supplies for information on removing the peripheral power supplies.

10. Disconnect the PCMs from the centerplane.

    See Chapter 7, Power Supplies for information on removing the PCMs.

11. If present, disconnect the auxiliary fan tray from the centerplane.

    See "Auxiliary Fan Tray Assembly" for information on removing the auxiliary fan tray.

12. If present, disconnect all the filler panels from the centerplane.

    1. Use a Phillips #1 screwdriver to turn the arrows in the quarter-turn access slots on the filler panels to the unlocked position. See Figure E-2.

    2. Pull out and disengage the filler panels from the centerplane.

13. From the front of the system, remove the 24 screws that secure the centerplane to the main chassis.

14. Remove the centerplane.

Replacing the Centerplane

1. Replace the 24 screws to secure the centerplane to the main chassis.

2. Replace and secure the front chassis to the centerplane.

   Use the three guide pins to align the front chassis with the centerplane.

   Figure E-12 Centerplane Guide Pins

   
   

3. Replace the two screws on the top front corners that secure the front chassis to the main chassis. See Figure E-11.

4. Replace the 15 screws on each side that secure the front chassis to the main chassis. See Figure E-11.

5. Connect all the cables to the centerplane.

   1. Connect the key switch PWB centerplane cable assembly.

      See "Key Switch PWB Centerplane Cable Assembly" for information on connecting this cable.

   2. Connect the media tray data and DC power cable assemblies.

      See "Media Tray Data and DC Power Cable Assemblies" for information on connecting these cables.

6. If present, connect the auxiliary fan tray to the centerplane.

   See "Auxiliary Fan Tray Assembly" for information on replacing the auxiliary fan tray.

7. Connect the PCMs to the centerplane.

   See Chapter 7, Power Supplies for information on replacing the PCMs.

8. Connect the peripheral power supplies to the centerplane.

   See Chapter 7, Power Supplies for information on replacing the peripheral power supplies.

9. Connect all the boards to the centerplane.

   See Chapter 3, CPU/Memory+ Boards and Components, Chapter 4, I/O+ Boards and Components, Chapter 5, Clock+ Board, and Chapter 6, Interface Board for information on replacing the boards.

10. Replace all the filler panels.

    1. Slide the filler panels toward the centerplane.

       Ensure that the arrows in the quarter-turn access slots point to the unlocked position.

       The filler panel should insert and seat smoothly. If it binds, remove it, and inspect the slot for any obvious obstructions.

    2. Use a Phillips #1 screwdriver to turn the arrows in the quarter-turn access slots to the locked position. See Figure E-2.

11. Replace all the disk drives.

    See Chapter 8, Internal SCSI and FC-AL Devices for information on replacing the disk drives.

12. Replace the fan tray assembly.

    See "Fan Tray Assembly" for information on replacing the fan tray assembly.

13. Replace the panels covering the front of the chassis.

    Complete the steps in Appendix E, Non-Chassis Field Replaceable Units (FRUs).