Lenovo ThinkSystem SR665 V3 User Manual page 181

• Read "Installation Guidelines" on page 47
work safely.
• Prevent exposure to static electricity, which might lead to system halt and loss of data, by keeping static-
sensitive components in their static-protective packages until installation, and handling these devices with
an electrostatic-discharge wrist strap or other grounding system.
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
b. Rotate the CMA out of the way to gain access to the power supply unit.
Note: Your CMA kit might look different from the illustration.
Figure 126. 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.
and "Safety inspection checklist" on page 48
and rotate it to the open position.
1
"Power supply LEDs" on page
Chapter 5
to ensure that you
491.
.
Hardware replacement procedures
171