Acoustic Research AW722 Headphones User Manual

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900MHz
Wireless Headphones
Receives signal up to 150 ft (45m)*
Thank you for choosing the
AR Brand 900MHz Wireless Headphones.
Before attempting to use your headphones, please remove all parts
from this package and read the installation and usage instructions carefully.
* Range may vary by environment and hookup.
AW722/AW772
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HEADSET SAFETY
TABLE OF CONTENTS
Follow these precautions for safe usage of your wireless headphones.
1. These wireless headphones have been designed for residential use and should not be
used for industrial purposes. The headphones should be installed and used in
accordance with the instructions contained in this manual.
2. Read through these instructions completely before installation. Follow the instructions
carefully and carry them out in the correct order. Keep the manual on hand for future
reference.
3. The power for this headphone system is delivered with batteries. Before charging, read
the instructions in this manual. Disconnect the power supply from the recharging
cradle/transmitter before installing or removing batteries.
4. Always leave easy access to the main power supply.
5. Disconnect the unit from the main power supply during storms, or if you will be absent
for a long period of time.
6. If you observe smoke or detect a burning odor, immediately disconnect the device from
the main power supply.
7. Never open the unit yourself; you may receive a severe electric shock, leading to serious
injury or even death.
8. Protect the unit from dust, humidity and sources of excessive heat (e.g., fireplace or
radiator).
9. The power source should not be in contact with liquids or exposed to the risk of
dripping or splashing liquid. Be careful not to place the power source or recharging
cradle/transmitter near any object containing liquid (e.g., a vase, glass or bottle).
10. Do not expose the unit to direct sunlight. Its maximum ambient temperature is
95° Fahrenheit (35° Celsius).
11. The ventilation should not be impeded by covering the unit with any items, such as
newspapers, tablecloths, curtains, etc.
12. No flame sources, such as lighted candles, should be placed on or close to the
recharging cradle/transmitter.
13. This unit has been designed for use in a dry environment. If, for exceptional reasons,
you must utilize the unit out of doors (balcony, veranda, etc.), take care to protect it
from dampness (dew, rain or splashes of liquid).
14. The maximum ambient humidity that the device supports is 85 percent. If the unit is
cold and you wish to use it in a warm room, wait until any condensation on the unit
evaporates by itself before you turn it on.
15. Clean the unit with a soft cloth soaked in a neutral detergent. You may damage the unit
if you use an alcohol-based product. If you are unsure if the detergent is alcohol-based,
test the cleaning product on the underside of the unit.
Thomson Inc. declines all liability for any use that does not comply with the instructions in
this User’s Manual.
Keep your sales receipt to obtain warranty parts and service and for proof of purchase.
Attach it here and record the model number. This number is located on the product.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Headphone Set Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Recharging the Headset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Recharging Cradle/Transmitter Description . . . . . . . . . . . . . . . . . . . . . . .5
Supplied Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Battery Installation and Information
Installing the Rechargeable Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Charging the Rechargeable Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
NiMH Rechargeable Battery Memory Effect . . . . . . . . . . . . . . . . . . . . .7
NiMH Natural Power Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
NiMH Battery Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Connecting the Recharging Cradle/Transmitter . . . . . . . . . . . . . . . . . . .8
Operation
Standard Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Alternate Installation Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Model No. ____________________________
Purchase Date: ________________________
Dealer/Address/Phone: __________________________________________________________
________________________________________________________________________________
This device complies with Part 15 of the FCC Rules. Operation of this device is subject to
the following two conditions: (1) This device may not cause harmful interference, and (2)
this device must accept any interference recieved, including interference that may cause
undesired operation.
900 MHz RF technology lets you roam freely throughout your house
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INTRODUCTION
Congratulations on your purchase of this wireless headphone
system. The AW722/AW772 utilizes wireless, radio frequency
transmission (900 MHz). The headphones are induction recharged
using an electric field and incorporate Phase Lock Loop (PLL)
technology, which offers three channels for radio transmissions.
This 900 MHz stereo wireless headphone system features a compact
design that enables you to enjoy music and TV sound just about
anywhere inside or outside your home. It’s simple to connect this
system to any sound source, such as a DVD, DBS, CD, TV, VCR,
stereo receiver or radio.
FEATURES
Operating distance up to 150 feet/45 meters from cradle/transmitter*
No line-of-sight limitations
Convenient power, volume and tuning controls located on headphones
* Range may vary by environment.
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HEADPHONE SET DESCRIPTION
RECHARGING THE HEADSET
For stand-alone functioning, your wireless headphones must be
powered by rechargeable batteries (included). The rechargeable batteries
must be installed into the battery compartment and recharged before
use. (See Battery Installation and Information, page 6).
To recharge the headset unit, place the headphones into the recharging
cradle/transmitter with the charge indicator facing to the front.
It is important that the headphones are placed in a completely vertical
position, not leaning to either side. If the headphones are placed
correctly, the charge indicator light on the headphones illuminates.
On indicator:
correct recharge
position
Off indicator:
incorrect
recharge
Fine tuning control
(AW722: knob)
(AW772: button)
Volume control
On indicator
RECHARGING CRADLE/TRANSMITTER
On/off button
The recharging cradle/transmitter acts both as the transmitter of the signal
to the headphones as well as the recharging base.
Rechargeable batteries
BACK
FRONT
Charging contact
Power on indicator
Charge indicator
AUDIO IN
input jack
Rechargeable
battery compartment
Rechargeable
battery compartment
Channel selection control 1, 2, 3
DC IN power supply socket
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SUPPLIED ACCESSORIES
BATTERY INSTALLATION AND INFO (continued)
This headphone system includes accessories that enable you to use your
wireless headphone set in a number of ways. (See sections on Standard
Usage, page 8, and Alternate Installation Configuration, page 9).
Charging the Rechargeable Batteries
Follow these steps to recharge the NiMH rechargeable batteries.
1. Connect the AC/DC main power adapter to the DC IN
power supply socket, located on the back of the recharging
cradle/transmitter.
2. Then, plug the adapter into an electrical outlet.
Stereo Y adapter cable
Main power adapter
(RCA/3.5 mm jack)
(AC/DC: 120 V ~ 60 Hz, 12 V = 200mA)
3. Place the headphones into recharging cradle/transmitter, with
the charge indicator facing to the front. Make sure the headphones
are placed in a completely vertical position, not leaning to either
side. If the headphones are placed correctly, the charge indicator
light illuminates.
4. Subsequent charging must be performed in about 15-17 hours.
NiMH Rechargeable Battery Memory Effect
3.5 mm/6.35 mm jack adapter
Stereo cable
(3.5 mm jacks)
Rechargeable batteries
When an NiMH rechargeable battery is first used, it is important to fully
charge it and then allow it to discharge three times in order to maximize
the battery’s storage capacity. When a battery is recharged before
it is completely discharged, it develops a memory that will limit the
amount of charge in the future. This reduces the battery’s storage
capacity for subsequent charges and so reduces the amount of time
your headphones can be used before recharging is necessary.
(600mAH, NiMH)
NiMH Natural Power Discharge
BATTERY INSTALLATION AND INFORMATION
Your wireless headphone unit requires two rechargeable AAA batteries.
The two rechargeable batteries that are supplied with your wireless
headphones are uncharged. Before you can use the wireless headphones,
the batteries must be charged. Follow these steps to charge and install
the batteries.
Due to their chemical design, all rechargeable batteries incur some
degree of natural discharge. This means they automatically lose their
charge in varying degrees, even when not in use. The size of this power
loss varies, depending on the battery’s type, size, design, internal
resistance and, most especially, the temperature. The higher the
temperature, the greater the power loss through natural discharge.
NiMH Battery Warning
Installing the Rechargeable Batteries
Take care to follow these steps to correctly charge and install the batteries.
1. On the left earphone, locate the battery compartment and the word
“Open.” Use your fingernail in the groove on top of the battery
compartment to lift the cover.
2. Insert two AAA rechargeable batteries (included), carefully following
the markings inside to ensure the batteries are inserted properly, with
the + and – ends in the correct positions.
1. To avoid risk of fire, explosion and injury, do not attempt to recharge
non-rechargeable batteries.
2. Respect the environment and the law. Before disposing of
rechargeable batteries, ask your retailer if they can be recycled and
whether or not the retailer collects rechargeable batteries
for recycling.
3. Replace the battery compartment cover.
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CONNECTING THE RECHARGING
CRADLE/TRANSMITTER
Follow this quick setup guide to ensure trouble-free installation of your
headphones. To connect the recharging cradle/transmitter to the audio
source, follow these steps.
OPERATION (continued)
6. After selecting a channel, use the fine tuning control, located on right
earphone to adjust the reception. The PLL function automatically
locks the three channels, providing you with top-quality audio
reception with no sound loss.
1. Plug the stereo audio cable into the headphone jack of your audio
source (e.g., stereo, TV, CD player, DVD, etc.). If your audio source
has two RCA output jacks instead of a headphone jack, use the
supplied Y cable to connect your headphones to the two (red and
white) RCA jacks.
7. Adjust the volume using the volume control, also located on the
right earphone.
2. Connect the other end of the stereo audio cable to the AUDIO IN
socket at the back of the recharging cradle/transmitter.
Note: To ensure that your headphones are charged and ready for
use at all times, place them in the recharging cradle/transmitter when
not in use.
3. Connect the AC/DC main power adapter to the DC IN power
supply socket at the back of the recharging cradle/transmitter. Then,
connect the adapter to an electrical outlet.
OPERATION
Standard usage
1. Switch on the audio source (TV, DVD, CD player, etc.) to which the
recharging cradle/transmitter is connected. If your audio source is
a DVD or CD player, start a disc.
WARNING: The recharging cradle/transmitter has an automatic
function that switches it off if the audio input jack does not receive
an audio signal for approximately two minutes. If the volume on the
audio source is too low, the recharging cradle/transmitter also
switches off after two minutes. This feature was installed to comply
with current legislation that reduces the amount of radio emissions
in the environment. To ensure that this function is not accidentally
triggered, set the audio source volume at approximately 50 percent
capacity. Consult your component user’s manual for details on how
to set the volume for headphones/earphones.
8. When you are through using the headphones, switch them off
using the POWER ON/OFF button, and place the audio source
on standby.
Alternate Installation Configuration
The accessories included with your headphone system include a jack
adapter for connecting the unit to a 6.35 mm headphone socket and
a Y cable. Normally, when a device is plugged into a headphone jack,
it automatically shuts off the speakers. If you want the speakers to
continue playing while you are using the headphone set, you can use
the Y adapter instead of the headphone jack. Use the supplied Y cable
to connect your headphones to the two (red and white) RCA jacks.
Connect the other end of the stereo audio cable to the AUDIO IN input
jack at the back of the recharging cradle/transmitter. This is especially
useful if, for example, your family is listening to music in one room
of your home and you want to listen to the same music in another
room. It is also beneficial in families where one person has a hearing
impairment. That person can use the headphones to listen to the
audio source, adjusting the volume as needed. This type of connection
also enables you to use your headphones more simply as you will
only need to switch on the audio source and switch on your
headphones to activate.
2. The recharging cradle/transmitter is now ready to receive an audio
signal. The recharging cradle/transmitter is activated automatically
when receiving an audio signal from the audio source.
3. Check to make sure the power on indicator light on the front of the
recharging cradle/transmitter is lit, indicating that the unit is ready.
4. Push the POWER ON/OFF button, located on the right earphone.
The LED light turns on to indicate activation.
5. The recharging cradle/transmitter features three channels for radio
frequency transmissions. Select one of these channels, using the
switch on the back of the recharging cradle/transmitter.
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TROUBLESHOOTING
SPECIFICATIONS
Refer to this troubleshooting section if you encounter any difficulties in
setting up and using your headphones.
Models
AW722
AW772
Description
Radio Frequency
Wireless Headphones System
PROBLEM
SOLUTION
No sound heard
through the
headphones
A) Check that your audio source, recharging
cradle/transmitter and headphones are
connected, supplied properly and turned on.
B) Check to ensure that the rechargeable
batteries are installed in the headset
correctly and have been recharged properly.
C) Check to ensure the recharging cradle/
transmitter is running and the power
indicator light on the unit is lit.
D) Check that the audio source is delivering
a sufficient signal to the recharging cradle/
transmitter’s AUDIO IN input jack.
Poor sound quality
or interference
Power cut off
A) Check to ensure that the sound provided
by the audio source is loud enough and
of sufficient quality.
B) Check if the batteries in the headphones have
sufficient power. Recharge or replace them,
if necessary.
C) Check to see if you have selected the best
transmission channel (1, 2, or 3) to provide
the optimum signal reception. If necessary,
try another channel, remembering to finetune the reception using the tuning control.
D) Check if the distance between the
headphones and the recharging cradle/
transmitter is within the operating range.
(The effective range of this device is up to
150 feet/45 meters from the cradle/
transmitter.)* If out of range, move closer to
the recharging cradle/transmitter to receive
the sound.
E) Check that the audio source provides
stereo sound.
The recharging cradle/transmitter has an
automatic power off function. When no signal
is received for 2 minutes through the recharging
cradle/transmitter’s AUDIO IN input jack, it
switches off. Switch on your audio source again,
and use the tuning control to adjust reception. If
necessary, increase the audio source’s volume.
Transmitter
Carrier Frequency
900 MHz
Effective Range
Up to 150 feet/45 meters*
Power Supply
12 V (DC) via a 120 V–60 Hz (AC)
main power supply adapter
Transmission Frequency
UHF – 900 MHz/three channels:
911.9 MHz (1), 912.6 MHz (2)
and 913.3 MHz (3)
Headset
Power Supply
Two AAA 1.2 V rechargeable batteries
* Range may vary by environment.
LIMITED ONE YEAR WARRANTY
Limited One Year Warranty
Our company (in the U.S.,THOMSON INC.) warrants that for one year
from date of purchase, it will replace this product if found to be defective
in materials or workmanship. For a prompt, no charge replacement of
equivalent product, return the defective product postage prepaid to the
appropriate address.
Product Exchange Center
11721 Alameda Avenue
Socorro TX 79927
This replacement is the company’s sole obligation under this warranty.
THOMSON INC. will not be responsible for any incidental or
consequential damages or for any loss arising in connection with the
use or inability to use this product. Some states do not allow the
exclusion or limitation of incidental or consequential damages, so the
above limitation or exclusion may not apply to you. This warranty
excludes defects or damage due to misuse, abuse, or neglect. This
warranty gives you specific legal rights, and you may also have other
rights, which vary from state to state.
* Range may vary by environment.
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© 2006 THOMSON INC.
10330 North Meridian Street
Indianapolis, IN 46290 USA
AW722/AW772
Trademark(s) Registered
All other brands and product names are trademarks or
registered trademarks of their respective owners.