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Chapter 3
Maintaining the Server
Replacing the Motherboard RTC Battery
There is danger of explosion if the battery is replaced incorrectly. Replace the battery only with the
Warning
same or equivalent type recommended by the manufacturer. Dispose of used batteries according to
the manufacturer's instructions. [Statement 1015]
The real-time clock (RTC) battery retains system settings when the server is disconnected from power.
The battery type is Panasonic CR2032 or equivalent.
To replace or install the motherboard CMOS battery, follow these steps:
Remove the RTC battery (see
Step 1
a.
b.
If you cannot safely view and access the component, remove the server from the rack.
Caution
c.
d.
e.
Step 2
Install an RTC battery:
a.
Note
b.
c.
d.
OL-26646-01
Figure
Power off the server as described in the
page
3-6.
Slide the server out the front of the rack far enough so that you can remove the top cover. You might
have to detach cables from the rear panel to provide clearance.
Remove the top cover as described in
page
3-7.
Locate the RTC battery. See
Gently remove the battery from the holder on the motherboard. Pull the retaining clip in the battery
holder away from the battery to provide clearance.
Gently insert the battery into the holder and inside the retaining clip.
The positive side of the battery marked "3V+" should face upward.
Push the battery into the socket until it is fully seated.
Replace the top cover.
Replace the server in the rack, replace cables, and power on the server by pressing the Power button.
3-17):
"Shutting Down and Powering Off the Server" section on
"Removing and Replacing the Server Top Cover" section on
Figure
3-17.
Cisco UCS C22 Server Installation and Service Guide
Installing or Replacing Server Components
3-27
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