PRO-44 Programmable Scanner
(200-0304)                 Alternate Power Sources    Faxback Doc. # 39624

Using Other Power Sources

Important Information About The External Power Jacks

The scanner has two external power jacks - PWR and CHG.  It is important
that you understand the purpose of each jack before you connect any adapter
to the scanner.

The PWR jack powers the scanner and disconnects the internal batteries.
You can use this jack with an external power source (AC or DC adapter)
regardless of the type of batteries you install.

The CHG jack supplies power to operate the scanner and also charges the
internal batteries.  Use the CHG jack only when you install rechargeable
nickel-cadmium batteries.

WARNING:  Never use the CHG jack with non-rechargeable batteries!  If you
          try to recharge non-rechargeable batteries, they become very hot
          and could explode.

Using An AC Power Source

To power the scanner from AC power, you need Radio Shack's AC adapter
(Cat.No. 20-188).  Plug the adapter's barrel plug into the PRO-44's PWR
jack.  Then plug the adapter's power module into a standard AC outlet.

When you finish using the AC adapter, disconnect it from the AC outlet
first.  Then disconnect it from the scanner.

NOTE:  If you have installed rechargeable nickel-cadmium batteries in the
       scanner, you can connect the AC adapter to the CHG jack. This powers
       the scanner and recharges the batteries at the same time. See "Charg-
       ing Nickel-Cadmium Batteries".

Using A DC Adapter

NOTE:  Mobile use of a scanner may be unlawful or require a permit in some
       areas.  Check the laws in your area.

You can power the scanner from your vehicle's cigarette lighter socket,
provided the vehicle has a 12-volt, negative-ground electrical system.  To
do so, you need Radio Shack's Universal DC Adapter (Cat. No. 270-1560A).

Follow these steps to use a DC adapter.

1.  Connect the adapter's orange barrel plug to the adapter's cable with the
    tip set to (-)(negative).

2.  Set the adapter's voltage switch to 9V.

3.  Insert the barrel plug into the scanner's PWR jack.

4.  Plug the other end of the adapter into your vehicle's cigarette lighter
    socket.

When you finish using the DC adapter, disconnect it from the cigarette
lighter first.  Then disconnect it from the scanner.

NOTES:  If you have installed rechargeable nickel-cadmium batteries in the
        scanner, you can connect the DC adapter to the CHG jack.  This
        powers the scanner and recharges the batteries at the same time.
        See "Charging Nickel-Cadmium Batteries" and the warning there.

        If the scanner does not operate properly when you use a DC adapter,
        unplug the adapter from the lighter socket and clean the socket to
        remove ashes and other debris.

Charging Nickel-Cadmium Batteries

The scanner has a built-in charging circuit that lets you recharge nickel-
cadmium batteries (Cat. No. 23-125) while they are in the scanner.  To
recharge the batteries, simply connect an AC adapter (Cat. No. 20-188) or a
DC adapter (Cat. No. 270-1560A) to the scanner's CHG jack.

WARNING:  Do not connect either adapter to the scanner's CHG jack if you
          have installed non-rechargeable batteries (standard, extra-life,
          or alkaline).  Non-rechargeable batteries become hot and can even
          explode if you try to recharge them.

          It takes about 10 to 18 hours to recharge batteries that are fully
          discharged.  You can operate the scanner while recharging nickel-
          cadmium batteries, but the charging time is lengthened.

Charging Tip

Nickel-cadmium batteries last longer and deliver more power if you occasion-
ally let them fully discharge.  To do this, simply use the scanner until the
low battery indicator appears on the display.  Then fully charge the batt-
eries.


(EB 5/20/97)

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