MICRO-21  (140-1159)            Power Sources          Faxback Doc. # 7186

You can power your Micro-21 from internal battery power, AC power, or your
vehicle's battery power.

USING BATTERIES

You can use two AA batteries, such as Radio Shack Cat. No. 23-552, to
power your Micro-21.  Or,    you can use rechargeable nickel-cadmium
batteries (Cat. No. 23-125) with a battery charger (Cat. No. 23-133).

CAUTIONS:  Use only fresh batteries of the required size and type.

           Never leave dead or weak batteries in the Micro-21.

           If you do not plan to use the Micro-21 for several days, remove
           the batteries.

           Do not mix a non-rechargeable battery with a rechargeable
           battery, or rechargeable batteries of different capacities.

           Dispose of old batteries promptly; do not bury of burn them.

Follow these steps to install the batteries:

1.  Press down on the battery compartment cover and slide it off in the
    direction of the arrow.

2.  Insert the batteries into the compartment as indicated by the polarity
    symbols (+ and -) marked inside the compartment.

3.  Replace the cover.

NOTE:  Your recorder is capable of using rechargeable nickel-cadmium
       batteries.  At the end of the batteries' useful life, they must be
       recycled  or disposed of properly.  Contact your local, county, or
       state hazardous waste management authorities for information on
       recycling or disposal for information on recycling or disposal for
       information on recycling or disposal programs in your area.  Some
       options that might be available are: municipal curbside collection,
       drop-off boxes at retailers, recycling collection centers, and
       mail-back programs.

USING AC POWER

To power the Micro-21 from an AC outlet, you need an AC adapter (not
supplied), such as Cat. No. 273-1650.

CAUTIONS:  You must use an adapter that supplies 3 volts DC power and
           delivers at least 200 milliamps.  Its center tip must be set to
           negative, and its plug must properly fit the Micro-21's DC 3V
           jack.  The recommended adapter meets these specifications. 
           Using and adapter that does not meet these specifications could
           damage the Micro-21 or the adapter.

           Always connect the adapter to the Micro-21 before you plug it
           into the AC outlet, and unplug the adapter from the AC outlet
           before you unplug it from the Micro-21.

Follow these steps to power the Micro-21 from an AC power outlet.

1.  Set the adapter's voltage switch to 3V.

2.  Attach the green-rimmed barrel plug to the adapter's cord with the tip
    set to negative (-).

CAUTION:  Be sure to set the tip polarity to negative (-).  If the
          polarity is reversed, the recorder or tape might be damaged.

3.  Insert the plug into the recorder's DC 3V jack.  This disconnects any
    internal batteries.

4.  Plug the adapter into a standard AC power outlet.

USING VEHICLE BATTERY POWER

To power the Micro-21 from your vehicle's battery, you need a DC adapter,
such as Cat. No. 270-1560.

CAUTIONS:  Your vehicle must have a 12-volt, negative-ground electrical
           system.

           You must use an adapter that supplies 3 volts DC power and
           delivers at least 200 milliamps.  Its center tip must be set to
           negative, and its plug must properly fit the Micro-21's DC 3V
           jack.  The recommended adapter meets these specifications. 
           using an adapter that does not meet these specifications could
           damage the Micro-21.

           Always plug the adapter into the Micro-21 before you plug it
           into the cigarette-light socket, and unplug the adapter from
           the cigarette-light socket before you unplug it from the
           Micro-21.

Follow these steps to power the Micro-21 from your vehicle's battery.

1.  Set the adapter's voltage switch to 3V.

2.  Plug the blue-rimmed barrel plug into the adapter's cord with the tip
    set to negative (-).

NOTE:  Be sure to set the tip polarity to negative (-).  If the polarity
       is reversed, the recorder or tape might be damaged.

3.  Insert the barrel plug into the Micro-21's DC 3V jack.

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

(ALL-9/15/94)