Removing And Replacing Tier 2 Crus; Removing The Chassis Midplane - Lenovo NeXtScale n1200 Installation And Service Manual

Removing and replacing Tier 2 CRUs

You may install a Tier 2 CRU yourself or request Lenovo to install it, at no
additional charge, under the type of warranty service that is designated for your
server.
The illustrations in this document might differ slightly from your hardware.

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" on page v and "Installation guidelines" on page 25
2. Shut down the operating systems and turn off any compute nodes in the
3. Open the release handles on the compute nodes and the management node, if
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 37. Top cover outward rotation
5. Loosen the three captive screws that secure the chassis midplane to the chassis.
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Lenovo NeXtScale n1200 Enclosure: Installation and Service Guide
chassis. See the documentation that comes with the compute node for detailed
instructions.
one is installed, to disengage the nodes from the chassis midplane connectors.