Lenovo ThinkSystem SD530 V3 - Page 136

b. Tighten the main system board screw to secure the power bus bar to the system board.
c.
Tighten the main PDB screw to secure the power bus bar to the power distribution board.
Figure 80. Installation of the power bus bar
Step 2. Tighten the six outer screws to secure the power bus bar.
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ThinkSystem SD530 V3 User Guide