Procedure
Step 1. If a cable management arm (CMA) is installed, adjust the CMA to gain access to the power supply
bay.
a. Press down the stop bracket
1 and rotate it to the open position.
b. Rotate the CMA out of the way to gain access to the power supply.
Note: Your CMA kit might look different from the illustration.
Figure 135. CMA adjustment
Step 2. Disconnect the power cord from the hot-swap power supply and the electrical outlet.
• For AC power input, 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 is lit. For the
location of the power output LED, refer to
“Power supply LEDs” on page 469.
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 out of the chassis.
Note: If your CMA kit obstructs in the way, slightly pull the power supply upwards when sliding the
power supply out of the chassis.
Chapter 5. Hardware replacement procedures 173
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