How to Replace the Coin Cell Battery on an OEC 9800 C-Arm

If your OEC 9800 C-Arm keeps resetting its date and time or showing small system errors during startup, there’s a good chance the coin cell (backup) battery on the workstation motherboard is running low.

This tiny battery stores the system’s internal clock and configuration data. When it’s weak or dead, the machine forgets its settings each time you power it down.

The good news? Replacing it is usually simple, as long as it’s done carefully and by someone qualified.

Let’s go through the process step-by-step.

Before You Start: Safety First

This is a medical X-ray device, so you should never open or service internal components unless you’re trained and certified.

If you’re not a biomedical engineer or authorized service provider, it’s best to contact GE Healthcare or a certified company such as PHI for help.

If you are qualified, here’s how to prepare safely:

1. Power off completely. Shut down the system and unplug it from the wall outlet.
2. Secure the unit. Lock the wheels so the C-arm won’t move while you work.
3. Ground yourself. Use an anti-static wrist strap to prevent static discharge.
4. Record system details. Note the current time, date, or any “battery missing” messages before replacing the coin cell.
5. Get the correct battery. Most OEC 9800 c-arm models use a CR2032 3-volt lithium coin cell, but always check your maintenance manual first.

Step-by-Step Replacement Guide

1. Access the electronics compartment

Open the back or side cover of the workstation to reach the internal card rack or motherboard area.
Look for the small, round coin-cell battery mounted on one of the main circuit boards. It’s usually labeled “Motherboard Battery” or “X-ray Controller PCB Battery.”

2. Remove the old battery

If the battery is held in a clip or socket, gently press the metal tab and lift the cell out.
Note which side faces up, typically, the “+” positive side is visible.

If the battery is soldered to the board, stop here and contact a qualified engineer. Soldered batteries should not be replaced without proper tools and experience.

3. Insert the new battery

Place the new CR2032 cell in the same orientation as the old one. Make sure it’s seated firmly and the contacts are clean.

4. Reassemble and restart

Replace the cover panels and reconnect the power cable.
Turn on the system and check that it starts normally.
If the date and time reset, set them manually; they should now hold correctly after shutdown.

5. Document the replacement

Write down the replacement date in your maintenance log or on a small service label. GE recommends changing this coin cell every two years as part of preventive maintenance.

Tips from the Field

• If you notice the OEC 9800 C-arm clock resets often, that’s your first sign the battery is fading.
• Don’t confuse the small coin cell with the larger system batteries that power exposures; they are completely separate.
• Keep a spare CR2032 battery in your maintenance kit. They’re inexpensive and can prevent future interruptions.
• Handle circuit boards gently and avoid touching other components.

Why It Matters

This small battery keeps your system’s internal settings alive even when the main power is off.
Replacing it on schedule prevents minor but frustrating issues, like having to re-enter time and date, and helps maintain consistent system behavior.

It’s a small job that goes a long way in keeping your C-arm reliable.