How to Replace Coin Cell Batteries in OEC 9900 SBCs
Matt Lenart: November 27, 2024
Proper maintenance often includes small but essential tasks like replacing coin cell batteries that end up playing a crucial role in keeping your OEC 9900 running well. Whether you're a master technician or figuring this out for the first time, this tutorial will cover what you need to know about replacing these batteries.
How to Access and Change the Batteries
- Remove the Back Panel
- Open the Access Panel
- Identify Single Board Computers
- Replacing Coin Cell Batteries
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How to Access and change the Batteries
1. Remove the Back Panel
Start by removing the back panel on the workstation. There are eight screws holding it in place. Unscrew them, flex the top of the panel out slightly, and pull it off to reveal the access panel inside.
2. Open the Access Panel
Once the back panel is removed, locate the access panel inside the workstation. It is secured with quarter-turn screws. Turn them to open the panel and expose the workstation’s interior.
3. Identify the Single-Board Computers
Inside the workstation, you will find two single-board computers (SBCs):
- The GPU board on the right.
- The RTOS (Real-Time Operating System) board on the left.
Both of these boards have coin cell batteries located approximately in the center of each board. Before proceeding, unplug the AC power from the wall for safety.
4. Replace the Coin Cell Batteries
Carefully remove and replace the coin cell batteries on both SBCs. Make sure they are seated securely in their holders.
Service Mode Changes
1. How to Enable Service Mode
Locate the small silver dip switch on the display adapter at the bottom of the workstation. Flip this switch up to enable service mode. Then, plug the workstation back into power and turn it on.
2. How to Access the BIOS
As the system boots, hold down the Delete key on the keyboard to enter the BIOS menu (this is likely an AMI BIOS system).
Once you're inside the BIOS, navigate to Load Optimized Defaults and select it.
Go to Standard CMOS Features to verify and adjust the date if necessary. Use the Page Up button to correct the date.
3. Save and Exit the BIOS
After verifying the settings:
- Press Escape to exit the menu.
- Press F10 to save the changes.
- Confirm by selecting Yes and pressing Enter.
The system will reboot with the updated settings.
4. Disable Service Mode
Once the system has rebooted and is fully operational, flip the dip switch on the display adapter back to its original position to disable service mode. This will restore normal boot-up screens.
5. Confirm System Operation
Verify that the workstation is fully booted and operational. At this point, the coin cell batteries in both SBCs have been successfully replaced.
