Lenovo ThinkSystem SR645 Maintenance Manual page 165

Procedure
Step 1. If the server is in a rack, adjust the cable management arm (CMA) to gain access to the power
supply bay.
If you have installed the 1U CMA Upgrade Kit for Toolless Slide Rail or Toolless Slide Rail Kit with
1U CMA, do the following:
Figure 65. CMA adjustment
1. Press down the stop bracket
2. Rotate the CMA out of the way to gain access to the power supply.
Step 2. Disconnect the power cord from the hot-swap power supply.
Note: If you are replacing two power supplies, replace them one by one to ensure that the power
supply to the server is not interrupted. Do not disconnect the power cord from the secondly
replaced power supply until the power output LED for the firstly replaced power supply is lit. For the
location of the power output LED, refer to Rear view LEDs.
and rotate it to the open position.
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Chapter 4
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Hardware replacement procedures
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