Replacing The Motherboard Rtc Battery - Cisco UCS C24 Installation And Service Manual
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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 RTC battery is on the motherboard under the fan tray.
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.
Note
f.
Install an RTC battery:
Step 2
a.
Note
b.
c.
d.
OL-26647-01z
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 on the motherboard between the PCIe risers (see
Use a small screwdriver or pointed object to push aside the metal clip that holds the battery in the
holder.
If you have difficulty reaching the battery because of cards in the PCIe risers, remove PCIe
riser 1 to provide access. See
Lift the battery from the holder.
Insert the battery into its holder positive-side-up and press down until it clicks in place.
The positive side of the battery marked "3V+" should face upward.
If you removed PCIe riser 1, replace it to its slot. See
Replace the top cover.
Replace the server in the rack, replace cables, and power on the server by pressing the Power button.
3-18):
"Shutting Down and Powering Off the Server" section on
"Removing and Replacing the Server Top Cover" section on
Replacing a PCIe Riser, page
Replacing a PCIe Riser, page
Cisco UCS C24 Server Installation and Service Guide
Installing or Replacing Server Components
Figure
3-18).
3-33.
3-33.
3-31
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