Cisco UCS C220 M4 Maintaining The Server page 26

Installing or Replacing Server Components
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 CR2032. Cisco supports the industry-standard CR2032 battery, which can be
purchased from most electronic stores.
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.
Install an RTC battery:
Step 2
a.
Note
b.
c.
Cisco UCS C220 M4 Server Installation and Service Guide
3-26
Figure
Power off the server as described in
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
Locate the RTC battery. See
Gently remove the battery from the holder on the motherboard.
Insert the battery into its holder and press down until it clicks in place.
The positive side of the battery marked "3V+" should face upward.
Replace the top cover.
Replace the server in the rack, replace cables, and power on the server by pressing the Power button.
3-14):
Shutting Down and Powering Off the Server, page
Removing and Replacing the Server Top Cover, page
Figure 3-14.
Chapter 3 Maintaining the Server
3-8.
3-9.
OL-32473-01