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- MX4000.2
- 11. Remove the 4 Phillips screws holding the case bot-
- tom, then remove the case bottom.
- 12. Reconnect the power supply to the scanner and set it
- to 4.0 volts.
- 13. Turn the scanner on.
- 14. Locate a small gray potentiometer on the printed
- circuit board. The potentiometer looks something
- like a gray plastic Phillips screw head. If the
- scanner front panel is facing you, the pot will be
- just behind the keyboard on the left side. (Don't
- confuse this pot with the 3 pots along the right
- edge of the board. The battery voltage sensor pot
- is not near any other pot.)
- 15. Slowly adjust the potentiometer to the threshhold at
- which the low battery indicator begins to flash.
-
- This procedure worked with great success on an MX-4200,
- and its battery life was increased from 2 to 7.5 hours.
-
- I would like to thank Rick Meyer, WB9UFL, for finding the
- potentiometer in his MX-4000, and Ron Smithberg for let-
- ting me experiment with his MX-4200.