Revision B 120 Series Maternal/Fetal Monitor 9-5
2015590-001
General Maintenance: Main Board Battery
Main Board Battery
The 120 Series Monitor contains a battery-backed RAM component on the Main
Board at U30 (414775-001) which stores default settings when the monitor is turned
off. To replace this chip:
1. Turn off the monitor and disconnect the power cord from the monitor.
2. Remove the nine screws which secure the monitor top cover. Four of the
screws are located on the bottom of the monitor and five are located in the back.
3. Remove the cover by sliding it towards the rear of the monitor.
4. Remove the hold-down screws securing the NBP Board (14582) to the chassis.
5. Slide the NBP Board out of the card cage, only enough to lay it on top of the
front end board cover. Use care not to disconnect the NBP tubes at either end.
6. Use a small screwdriver to remove U30 from the socket on the Main Board.
CAUTION
BATTERY DISPOSAL—Follow the battery manufacturer’s
recommendations or your hospital policy for the handling and
disposal of used batteries.
7. Snap the new battery chip into place. (No special tools are required.)
8. Reconnect the NBP Board to and secure with both hold-down screws. Ensure
that the blood pressure tubes remain secured in the notch on top of the DSP
Board.
9. Replace the monitor top cover and secure all nine screws.
10. Re-connect the power cord and turn on the monitor.
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