PRO-29 60-Channel Direct Entry Programmable Scanner
(200-0509)                 Power                      Faxback Doc. # 33543

POWER SOURCES

You can power your scanner from any of three sources:

    Internal batteries

    Standard AC power (using an optional AC adapter, Cat. No. 273-1652)

    Vehicle battery power (using an optional DC adapter, Cat. No. 270-1560)

USING INTERNAL BATTERIES

You can power your scanner with four AA batteries.  For the longest
operation and best performance, we recommend alkaline batteries (Radio
Shack Cat. No. 23-125).

WARNING:  The scanner has a built-in circuit that lets you recharge nickel
          cadmium batteries inside the battery compartment.  However, you
          must never use this circuit when you have installed non
          rechargeable batteries in the scanner. Be sure to read "Important
          Information about the External Power Jacks" and "Charging Nickel
          Cadmium Batteries", below.

Follow these steps to install or replace batteries.

1.  Press down the tab on the battery compartment cover, and lift open the
    compartment.

2.  Remove any old batteries from the compartment and cover.

    CAUTION:  Always dispose of old non-rechargeable batteries promptly and
              properly.  Do not bury or burn them.

3.  Install two batteries in the compartment and two in the cover as
    indicated by the polarity symbols (+ and -) marked inside.

    CAUTION:  Use only fresh, AA alkaline, nickel-cadmium, or general
              purpose batteries of the required size.  Never mix fresh and
              old batteries or different types of batteries.

4.  Replace the cover.

If BATT.Lo flashes on the display and the scanner beeps every 15 seconds,
immediately replace or recharge all four batteries.

IMPORTANT INFORMATION ABOUT THE EXTERNAL POWER JACKS

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

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


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

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

USING STANDARD AC POWER

To power the scanner from AC power, you need an AC adapter such as Radio
Shack Cat. No. 273-1652. Plug the adapter's barrel plug into the scanners DC
9V POWER jack.  Then plug the adapter's power module into a standard AC
outlet.

WARNING:  Do not use an AC adapter's polarized plug with an extension cord,
          receptacle, or other outlet unless the blades can be fully
          inserted to prevent blade exposure.

CAUTIONS:  You must use an AC adapter that supplies 9 volts and delivers
           at least 300 milliamps.  Its center tip must be set to negative,
           and its plug must correctly fit the scanner's DC 9V POWER jack.
           The recommended adapter meets these specifications. Using an
           adapter that does not meet these specifications could seriously
           damage the scanner or the adapter.

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

NOTE:  If you installed rechargeable nickel-cadmium batteries in the
       scanner, remove the cap from the CHARGE jack and connect the AC
       adapter to it.  This powers the scanner and recharges the batteries
       at the same time.  See "Charging Nickel-Cadmium Batteries", below.

USING VEHICLE BATTERY POWER

You can power the scanner from your vehicle's battery power, if the vehicle
has a 12-volt, negative ground electrical system.  To do so, you need a
Radio Shack DC Universal Adapter, Cat. No. 270-1560.

CAUTIONS:  You must use a DC adapter that supplies (regulated) 9-volt power
           and delivers at least 300 milliamps.  Its center tip must be set
           to negative, and its plug must correctly fit the scanner's DC 9V
           POWER jack.  The recommended adapter meets these specifications.
           Using an adapter that does not meet these specifications could
           seriously damage your scanner or the adapter.

To protect your vehicle's electrical system, always plug the adapter into
the scanner before you plug it into your vehicle's cigarette-lighter socket.
Always unplug the adapter from the vehicle's cigarette-lighter socket
before you unplug it from the scanner.

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

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

3.  Insert the barrel plug into the scanner's DC 9V POWER jack.

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

NOTES:  If you installed rechargeable nickel-cadmium batteries in the
        scanner remove the cap from the CHARGE jack and connect the AC
        adapter to it.  This powers the scanner and recharges the batteries
        at the same time.  See "Charging Nickel-Cadmium Batteries", below.

        If the scanner does not operate properly when you use a DC adapter,
        unplug the adapter from the cigarette-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 while they are in the scanner.  To charge the batteries,
remove the plug from the scanner's CHARGE jack and simply connect an AC
adapter or a DC Universal Adapter to the jack (see "Using Standard AC
Power" or "Using Vehicle Battery Power", above).

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

It takes about 14 to 16 hours to recharge batteries that are fully
discharged.  You can operate the scanner while recharging the nickel
cadmium batteries, but the charging time is lengthened.

NOTE:  Nickel-cadmium batteries last longer and deliver more power if you
       occasionally let them fully discharge.  To do this, simply use the
       scanner until It begins beeping every 15 seconds and BATT.Lo appears
       on the display.  Then fully charge the batteries.

IMPORTANT! At the end of a rechargeable battery's useful life, It must be
recycled or disposed of properly.  Contact your local county, or state
hazardous waste management authorities for information on recycling or
disposal programs in your area.  Some options that might be available are:
municipal curb-side collection, drop-off boxes at retailers, recycling
collection centers, and mail-back programs.

(BR/EB 6/11/96)