Checking Fitness of Stylus Internal Lithium Battery

1. Turn off the radio and remove the nicad battery.

2. Remove the front of the transmitter case surrounding the LCD display. There are a total of (4) screws. Two of the screws are located on the bottom of the transmitter case and the other two are located on the upper right and left hand corners of the LCD display bezel. The front screws are chrome plated Allen screws and require a metric Allen key (2.5mm).

3. Lay the transmitter on is back so that the sticks are pointing straight up.

4. Very carefully lift the LCD/bezel assembly about _" away from the transmitter case and slide the assembly toward you just until the lithium coin cell battery, mounted on the main circuit board (about the size of a quarter) is exposed. Do not move the LCD/bezel assembly any further than absolutely necessary. There is a delicate wiring harness and a ribbon cable that attach the LCD/bezel assembly to the main circuit board.

5. With a digital VOM (Volt-Ohm-Meter) set to read DC volts, touch one probe to the exposed surface of the battery (positive side) and touch the other probe to ground (any of the very small plated through holes above the silk-screened SANWA logo are connected to ground). DO NOT LET THE PROBES TOUCH EACH OTHER WHILE TESTING THE BATTERY, as a brief short will seriously degrade the life of the battery.

6. If the battery voltage is 2.95 or higher, the battery is fine and does not need to be replaced. The lithium battery should normally last at least five years.

7. The battery configuration is not a common size; therefore it is difficult to find. The battery should be purchased from Airtronics. Their part number is 798A30025A. Further if you do not have the equipment or soldering skills, it is recommended that you send your Stylus in to Airtronics and have them replace the battery. They will also perform the necessary initialization and re-calibration.

8. Re-assemble the Stylus following steps #1 - #4 in reverse.

9. If you have replaced the battery, you must perform the initialization and re-calibration procedure as detailed in the "Stylus Initialization and Re-Calibration Procedure".