Install the system I/O board

Follow instructions in this section to install the system I/O board. The procedure must be executed by a trained technician.

Procedure

1. Ensure that the FPC cable has been disconnected from the OCP interposer card and the system I/O board.

   • Disconnect the FPC cable from the OCP interposer card.

     1. Flip up the connector flap to the unlocked position, handling it gently to prevent damaging the latch.
        Figure 1. Flipping up the connector flap
        
        
     2. Gently disconnect the cable from the OCP interposer card.

   • Disconnect the FPC cable from the system I/O board.

     1. Pull up the connector latch.
        Figure 2. Pulling up the connector latch
        
        
     2. Gently disconnect the cable from the system I/O board.
2. If necessary, attach the labels to both ends of the cable that connects to the system board.
   1. Attach the white space portion of the label to one end of the cable.
   2. Wrap the label around the cable and attach it to the white space portion.
   3. Repeat to attach the other label to the opposite end of the cable.
   Figure 3. Label application
   
   

   Note

   See the table below to identify the corresponding labels for the cable.

   From	Label	To	Label
   System I/O board: System board connector	DC-SCM	System board: System I/O board connector	P2-DC-SCM DC-SCM
   		System board: SPI/eSPI connector	P3-SPI/eSPI DC-SCM

3. Install the system I/O board.
   1. Connect the cable to the system I/O board.
   2. Align the notches on the system I/O board with the retainers as illustrated. Align the connectors on the system I/O board with the slots on the NVMe drive and PCIe switch board cage; then, gently slide and insert the system I/O board into place.
   3. Tighten the four screws to secure the system I/O board and the cable.
      Note

      Tighten the screws with a torque screwdriver set to the proper torque. For reference, the torque required for the screws to be fully tighten is 0.9 ± 0.2 newton-meters.

      Figure 4. System I/O board installation
      
      
4. Connect the FPC cable to the system I/O board.
   1. Pull up the connector latch.
      Figure 5. Pulling up the connector latch
      
      
   2. Match the silkscreen on the FPC cable and the connector. Align the cable so that the exposed copper contacts face the corresponding pins on the connector; then, gently insert the cable into the connector on the system I/O board.

      Silkscreen on FPC cable	Silkscreen on system I/O board
      PHY2_CONN SIDE	PHY2_CONN

      Figure 6. FPC cable connection
      
      
   3. Press the connector latch to secure the cable.
      Figure 7. Pressing connector latch
      
      
   4. Visually inspect the cable installation to confirm the white line on the cable is invisible. The cable is not installed correctly if the white line remains visible.
      Figure 8. FPC cable installation inspection
      
      
5. Connect the FPC cable to the OCP interposer card.
   1. Flip up the connector flap to the unlocked position, handling it gently to prevent damaging the latch.
      Figure 9. Flipping up the connector flap
      
      
   2. Match the silkscreen on the FPC cable and the OCP interposer card. Then, connect the cable to the card with the silkscreen facing up.

      Silkscreen on FPC cable	Silkscreen on OCP interposer card
      NC-SI SIDE	NC-SI

      Figure 10. FPC cable connection
      
      
   3. Fully insert the cable into the connector; then, flip down the connector flap to the locked position to secure the cable.
      Figure 11. Flipping down the connector flap
      
      
   4. Visually inspect the cable installation to confirm the white line on the cable is invisible. The cable is not installed correctly if the white line remains visible.
      Figure 12. FPC cable installation inspection