low battery sensor threshold

 MX4200.1


   The low battery sensor  threshold  is  controlled  by  a

   potentiometer.   Here's how to readjust the sensor to 4.0

   volts:


    1.  Turn the scanner off.

    2.  Connect a digital voltmeter  to a well regulated  DC

        power supply and adjust the supply to 5.0 volts.

     3.  Connect the power supply to the  snap  terminals  on

        the  scanner that would normally connect to the bat-

        tery pack.  Be  sure  to  observe  proper  polarity.

        Connect  the  positive  lead  of  the  supply to the

        female snap, and the negative lead to the male snap.

    4.  Turn the scanner on.

    5.  As you watch the scanner's  LCD  display,  gradually

        reduce  the power supply voltage until the scanner's

        low voltage warning begins to flash.

    6.  Read the digital voltmeter.  If it reads between 3.9

        and  4.0  volts,  no further adjustment is required,

        just disconnect the supply and reconnect the battery

        pack.

    7.  Otherwise, turn off and disconnect the power supply,

        and continue.

    8.  Turn the scanner upside down, and place its

        cloth so as not to scratch the case.

    9.  Remove the bottom tilt foot from the scanner.

   10.  Remove the battery pack.

   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.

CONTINUED IN FILE MX4200.2



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