Radio Shack 33-1185 Manuel utilisateur

Cat. No. 33-1185

OWNER’S MANUAL

Please read before using this equipment.

Rechargeable 900 MHz

Wireless Stereo

Headphones

33-1185.fm Page 1 Wednesday, November 10, 1999 10:29 AM

INTRODUCTION

Your RadioShack Rechargeable 900

MHz Wireless Stereo Headphones bring

you the latest in wireless headphone

technology. They use the 900 MHz band

to deliver high-quality stereo sound to al-

most anywhere in or around your home.

The signals from your audio source can

easily travel through walls and floors, so

you can enjoy your favorite sounds with-

out disturbing others while you exercise

or work around your yard or house — up

to 150 feet away from your stereo. Its

features include:

Adjustable Deluxe Headphones —

headband automatically adjusts for the

most comfortable fit.

Supplied Rechargeable Nickel-Cad-

mium Batteries, Y Adapter Cable, 1/4-

Inch Adapter Plug, AC Adapter,

Charging Cable — everything you need

to power the headphones and connect

them to your home audio system.

Charging Jack — lets you charge re-

chargeable alkaline batteries in the

headphones.

Charging Indicator — lets you see

when the batteries are charging.

Volume Control — lets you easily ad-

just the volume to a comfortable listen-

ing level without adjusting the audio

source.

THE FCC WANTS YOU TO

KNOW

Your Wireless Stereo Headphones

might cause TV or radio interference

even when they are operating properly.

To determine whether your head-

phones are causing the interference,

turn off the headphones. If the interfer-

ence goes away, your headphones are

causing the interference. Try to elimi-

nate the interference by:

• moving your headphones’ transmit-

ter away from the receiver

• connecting your headphones’ trans-

mitter to an outlet that is on a differ-

ent electrical circuit from the

receiver

• contacting your local RadioShack

store for help

If you cannot eliminate the interference,

the FCC requires that you stop using

your headphones.

Note: Your headphones are subject to

interference from other devices, such as

cordless phones, wireless speakers,

and other wireless headphones that op-

erate on the same frequencies. If you

experience interference, try moving the

headphones away from the other de-

vice.

RadioShack is a registered trademark used by Tandy Corporation.

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CONTENTS

Preparation .............................................................................................................. 4

Connecting to an Audio Source .......................................................................... 4

Using AC Power ................................................................................................. 4

Installing Batteries .............................................................................................. 5

Charging Rechargeable Batteries ................................................................ 6

Operation ................................................................................................................. 7

Listening Safely .................................................................................................. 7

Using Your Headphones .................................................................................... 7

Adjusting the Frequency ..................................................................................... 8

Troubleshooting ...................................................................................................... 9

Care and Maintenance .......................................................................................... 10

Specifications ....................................................................................................... 11

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PREPARATION

CONNECTING TO AN

AUDIO SOURCE

Caution: Do not connect the transmitter

to the audio source's speaker output.

Doing so could damage the transmitter

and audio source.

Connect the transmitter to your audio

source's stereo headphone jack or to

separate left and right audio output jacks

(if available). If you connect the transmit-

ter to audio output jacks, you can use

the headphones’ volume control to ad-

just the volume without turning up the

volume on your audio source.

To connect the transmitter to your audio

source's stereo headphone jack, plug

the single (1/8-inch) end of the supplied Y

adapter cable into the headphone jack

and connect the other ends into the sup-

plied stereo audio cable (red plug to red

jack and white plug to white jack). Then

connect the red plug to transmitter's R/

AUDIO IN jack and connect the white

plug to the L/AUDIO IN jack.

Note: To connect a Y-adapter to a 1/4-

inch headphone jack, slip the supplied

1/4-inch adapter plug over the 1/8-inch

plug and complete the connections.

To connect the transmitter to your audio

source's audio output jacks, connect

one end of the supplied stereo audio ca-

ble to the transmitter's R/AUDIO IN and

R/AUDIO IN jacks (red plug to R/AUDIO

IN and white plug to L/AUDIO IN). Then

plug the other ends into the audio

source's audio output jacks (red plug to

the right channel and white plug to the

left channel).

USING AC POWER

Use the supplied 12-volt, 100-mA AC

adapter to connect the transmitter to AC

power.

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Cautions:

You must use a Class 2

power source that supplies

12 volts DC and delivers at

least 100 mA. Its center tip must be

set to positive and its plug must fit

the transmitter's DC 12V jack. The

supplied adapter meets these speci-

fications. Using an adapter that

does not meet these specifications

could damage the transmitter or the

adapter.

• Always connect the AC adapter to

the transmitter before you connect it

to AC power. When you finish, dis-

connect the adapter from AC power

before you disconnect it from the

transmitter.

Plug the supplied AC adapter’s barrel

plug into the transmitter’s DC 12V jack,

then plug the adapter into a standard AC

outlet.

INSTALLING BATTERIES

To power the headphones’ receiver, use

the three supplied AAA nickel-cadmium

rechargeable batteries. Or, you can use

three AAA alkaline batteries (not sup-

plied, available at your local RadioShack

store).

Cautions:

• Use only fresh batteries of the

required size and recommended

type.

• Do not mix old and new batteries,

different types of rechargeable bat-

teries, or rechargeable batteries of

different capacities.

Follow these steps to install batteries.

1. Remove the battery compartment

cover on the left earpiece by push-

ing up the tab and pulling the cover

up in the direction of the arrow.

2. Place the batteries over the ribbon

in the compartment, as indicated by

the polarity symbols (+ and –) in the

illustration.

3. Replace the cover.

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When the headphones stop operating

properly, replace or recharge the batter-

ies.

Warnings:

• Do not dispose of the batteries in a

fire because they can explode.

• Do not open or mutilate a battery.

Swallowing a battery can be fatal.

• Be careful not to short the batteries

with conducting materials, such as

rings, bracelets, and keys. The bat-

teries or the conductor might over-

heat and burn.

• Do not attempt to charge alkaline

batteries.

Caution: When you replace the batter-

ies, use replacement batteries of the re-

quired type (AAA), available through

your local RadioShack store.

Important: This product

can use nickel-cadmium

rechargeable batteries.

At the end of a nickel-

cadmium battery's useful

life, it must be recycled or

disposed of properly. Contact your local,

county, or state hazardous waste man-

agement authorities for information on

recycling or disposal programs in your

area or call 1-800-843-7422. Some op-

tions that might be available are: munici-

pal curbside collection, drop-off boxes at

retailers such as your local RadioShack

store, recycling collection centers, and

mail-back programs.

Charging Rechargeable

Batteries

Before using your headphones for the

first time, you must charge the head-

phones’ batteries for at least 24 hours. If

the headphones' range decreases or

you hear no sound from the audio

source, recharge the batteries. It takes

12 to 14 hours to completely recharge

the batteries.

Follow these steps to charge the batter-

ies.

1. If necessary, press the headphones'

POWER ON/OFF button to turn off

the headphones.

Note: You cannot charge the batter-

ies with the headphones turned on.

2. Plug the supplied charging cable

into the headphones' CHARGE jack

on the left earpiece.

3. Plug the other end of the charging

cable into the transmitter base's

CHARGE jack. The indicator beside

the jack lights.

4. When charging is complete, unplug

the charging cable. The indicator

turns off.

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OPERATION

LISTENING SAFELY

To protect your hearing, follow these

guidelines when you use headphones.

• Set the volume to the lowest setting

before you begin listening. After you

begin listening, adjust the volume to

a comfortable level.

• Do not listen at extremely high vol-

ume levels. Extended high-volume

listening can lead to permanent

hearing loss.

• Once you set the volume, do not

increase it. Over time, your ears

adapt to the volume level, so a vol-

ume level that does not cause dis-

comfort might still damage your

hearing.

USING YOUR

HEADPHONES

1. Turn on the audio source.

Note: If connecting headphones

does not automatically disable the

audio source’s speakers, turn off the

speakers.

If you connected the transmitter to

an audio source's headphone jack

(or a jack that is controlled by the

audio source's volume control), set

LEVEL on the back of the transmitter

about midway, then rotate the audio

source's volume control until the

indicator at the front of the transmit-

ter flashes. If the indicator does not

flash, rotate LEVEL clockwise until

the indicator flashes.

If you connected the transmitter to

an audio source's line output jack

(or a jack that is not controlled by

the audio source's volume control),

rotate VOL on the headphones fully

counterclockwise, then rotate LEVEL

until the indicator flashes rapidly or

remains lit.

Note: Some audio sources might

not make the indicator flash. For

these sources, rotate LEVEL all the

way to the left.

3. Press the head-

phones' POWER

ON/OFF button to

turn on the head-

phones. The

POWER indicator

on the left earpiece

lights.

4. Rotate TUNE until

the STEREO indi-

cator on the right

earpiece lights.

5. Put on the head-

phones and adjust

VOL on the right

earpiece to the

desired listening

level.

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6. To turn off the headphones, take off

the headphones, then press the

POWER ON/OFF button.

To preserve battery life, be sure to turn

off the headphones when you are not

using them.

Notes:

• The STEREO indicator on the right

earpiece lights when the head-

phones are receiving a clear signal.

As you move out of the transmitter's

range, the STEREO indicator turns

off. You still can hear the audio

source in mono until you move com-

pletely out of range.

• If reception is poor even when the

batteries are fully charged and you

are near the transmitter, try moving

the transmitter to a higher location

or moving it away from the audio

source.

ADJUSTING THE

FREQUENCY

If you receive interference from other

devices, you might be able to reduce the

interference by adjusting your head-

phones’ operating frequency.

Simply rotate FREQ ADJUST on the

transmitter then rotate TUNE on the right

earpiece until the STEREO indicator

lights steadily.

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TROUBLESHOOTING

We do not expect you to have any problems with your headphones, but if you do, the

following suggestions might help.

If you still have problems, take the headphones to your local RadioShack store for as-

sistance.

Problem Solution

No sound Be sure the headphones are turned on.

Charge the headphones' batteries.

Be sure the AC adapter is plugged in and has power.

Be sure all cables are connected securely.

Be sure the audio source is turned on and tuned to an

active channel.

If you have connected the transmitter to jacks that are

controlled by the audio source's volume control, be sure

the source's volume control is turned up.

If the stereo indicator on the right earpiece is not on,

adjust TUNE on the right earpiece until it turns on.

Adjust the headphones' volume control.

Change the position of the transmitter.

Distorted audio If the STEREO indicator on the right earpiece does not

light steadily, adjust TUNE on the earpiece until it turns

on.

Rotate FREQ ADJUST on the transmitter, then adjust

TUNE on the right earpiece until the STEREO indicator

on the earpiece lights steadily.

If you connected the transmitter to an audio source’s

headphone jacks, reduce the audio source’s volume.

Charge the headphone's batteries.

Change the position of the transmitter.

Adjust the LEVEL control on the transmitter so the level

indicator flashes only occasionally.

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CARE AND MAINTENANCE

Your RadioShack Rechargeable 900 MHz Wireless Stereo Headphones are an ex-

ample of superior design and craftsmanship. The following suggestions will help you

care for your headphones so you can enjoy it for years.

Keep the headphones dry. If they get wet, wipe them dry immediately.

Liquids might contain minerals that can corrode the electronic circuits.

Use and store the headphones only in normal temperature environ-

ments. Temperature extremes can shorten the life of electronic devices,

damage batteries, and distort or melt plastic parts.

Keep the headphones away from dust and dirt, which can cause prema-

ture wear of parts.

Handle the headphones gently and carefully. Dropping them can dam-

age circuit boards and cases and can cause the headphones to work

improperly.

Use only fresh batteries of the required size and recommended type.

Batteries can leak chemicals that damage your headphones’ electronic

parts.

Wipe the headphones with a damp cloth occasionally to keep them look-

ing new. Do not use harsh chemicals, cleaning solvents, or strong deter-

gents to clean the headphones.

Modifying or tampering with the headphones’ internal components can cause a mal-

function and might invalidate their warranty and void your FCC authorization to op-

erate them. If your headphones are not performing as they should, take they to your

local RadioShack store for assistance.

33-1185.fm Page 10 Wednesday, November 10, 1999 10:29 AM

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