Replacing the RTC battery

You need to locate the RTC battery inside the controller module, and then follow the specific sequence of steps. See the FRU map inside the controller module for the location of the RTC battery.

About this task

You can use the following animation or the written steps to replace the RTC battery.


  1. If you are not already grounded, properly ground yourself.
  2. Open the air duct:
    1. Press the locking tabs on the sides of the air duct in toward the middle of the controller module.
    2. Slide the air duct toward the back of the controller module, and then rotate it upward to its completely open position.
  3. Locate, remove, and then replace the RTC battery:
    1. Using the FRU map, locate the RTC battery on the controller module.
    2. Gently push the battery away from the holder, rotate it away from the holder, and then lift it out of the holder.
      Note: Note the polarity of the battery as you remove it from the holder. The battery is marked with a plus sign and must be positioned in the holder correctly. A plus sign near the holder tells you how the battery should be positioned.
    3. Remove the replacement battery from the antistatic shipping bag.
    4. Note the polarity of the RTC battery, and then insert it into the holder by tilting the battery at an angle and pushing down.
  4. Visually inspect the battery to make sure that it is completely installed into the holder and that the polarity is correct.
  5. Close the air duct.