Removing the chassis midplane

(Trained service technician only) Use these instructions to remove the chassis midplane from the NeXtScale n1200 Enclosure.

Before you remove the chassis midplane, complete the following steps:

1. Read Safety and Installation guidelines.
2. Shut down the operating systems and turn off any compute nodes in the chassis. See the documentation that comes with the compute node for detailed instructions.
3. Open the release handles on the compute nodes and the management node, if one is installed, to disengage the nodes from the chassis midplane connectors.
4. Disconnect the chassis from power.
5. Disconnect all cables from the modules in the rear of the chassis.
6. Remove the components from rear and front of the chassis.

To remove the chassis midplane, complete the following steps.

1. Disengage the compute nodes in the front of the chassis.
2. Remove the fan power control and power supplies from the chassis.
3. Loosen the three captive screws on the top cover.
4. Rotate the top cover outwards.
   Figure 1. Top cover outward rotation
   
   
5. Loosen the three captive screws that secure the chassis midplane to the chassis.
6. Lift up the chassis midplane half way. Put a screwdriver or a stick in the middle of the chassis midplane so your hands are free.
   Figure 2. Removal of the chassis midplane from a chassis
   
   
7. Unplug the two fan cables on chassis midplane
8. Carefully grasp the chassis midplane and slide it away from the chassis.
   Note

   Make sure that you do not grasp the connectors on the chassis midplane. You could damage the connectors.

   Figure 3. Removal of the chassis midplane from a chassis