Lenovo ThinkSystem SR635 V3 User Manual page 117

Figure 65. Adjusting the CMA
Step 2. Disconnect the power cord from the hot-swap power supply unit and the electrical outlet.
• For AC power supply units, disconnect both ends of the power cord and keep it in an ESD-safe
place.
• For 240 V DC power supply units, turn off the server, and then disconnect both ends of the
power cord and keep it in an ESD-safe place.
• For –48V DC power input:
1. Disconnect the power cords from the electrical outlet.
2. Use a slotted screwdriver to loosen the captive screws on the power supply terminal block.
3. Disconnect the power cords from the power supply unit, make the wire terminal insulated,
and keep them in an ESD-safe place.
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 unit is lit.
For the location of the power output LED, refer to
Step 3. Press the release tab toward the handle and carefully pull the handle at the same time to slide the
hot-swap power supply unit out of the chassis.
Note: If your CMA kit obstructs in the way, slightly pull the power supply unit upwards when sliding
the power supply unit out of the chassis.
"Power supply LEDs" on page
.
Chapter 5 Hardware replacement procedures
296.
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