Optimus 900 MHz User manual

Cat. No. 33-1165
OWNER’S MANUAL
Please read before using this equipment.
900 MHz Li
g
htwei
g
ht Wireless
Stereo Headphones
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2
INTRODUCTION
Your Optimus 900 MHz Lightweight
Wireless Stereo Headphones use the
900 MHz band to deliver high-quality
sound from an audio source (such as
a TV or radio) up to 150 feet away —
even through walls and floors!
The headphone system lets you enjoy
sound from your home audio system
without being tied down by wires be-
tween your audio source and the
headphones.
You can use the transmitter with an
unlimited number of receivers and
headphones (sold separately), so us-
ers in different parts of your home or
office can enjoy the benefits of wire-
less, full stereo sound at the same
time. Your local RadioShack store has
a full line of wireless headphones.
The system includes a transmitter,
stereo headphones, receiver, 1/8-inch
Y adapter cable, stereo audio cable,
AC adapter, and 1/4-inch plug adapter.
This symbol is intended to alert you
to the presence of uninsulated dan-
gerous voltage within the product’s
enclosure that might be of sufficient
magnitude to constitute a risk of
electric shock. Do not open the
product’s case.
This symbol is intended to inform
you that important operating and
maintenance instructions are in-
cluded in the literature accompany-
ing this product.
CAUTION
RISK OF ELECTRIC SHOCK.
DO NOT OPEN.
CAUTION: TO REDUCE THE RISK OF
ELECTRIC SHOCK, DO NOT REMOVE
COVER OR BACK. NO USER-SERVICE-
ABLE PARTS INSIDE. REFER SERVIC-
ING TO QUALIFIED PERSONNEL.
WARNING: To reduce the risk of
fire or shock hazard, do not ex-
pose this product to rain or mois-
ture.
!
!
©1998 Tandy Corporation.
All Rights Reserved.
Optimus and RadioShack are registered trademarks used by Tandy Corporation.
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3
PREPARATION
Before you can use your headphone
system, you must find a suitable loca-
tion for its transmitter, away from any
obstructions and within reach of a
standard AC outlet. Then make the
necessary transmitter connections.
CONNECTING THE
TRANSMITTER TO YOUR
AUDIO SOURCE
Caution: Do not connect the transmit-
ter to the audio source’s speaker out-
put. 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 to
audio output jacks, you can use the
headphone system’s volume control
to adjust the volume without turning
up your audio source.
To connect the transmitter to your au-
dio 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 supplied stereo audio
cable (red plug to red jack and white
plug to white jack). Then connect the
red plug to the 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, attach the sup-
plied 1/4-inch adapter plug over the 1/8
plug and complete the connections.
To connect the transmitter to your au-
dio source’s audio output jacks, con-
nect one end of the supplied stereo
audio cable to the transmitter’s R/AU-
DIO IN and L/AUDIO IN jacks (red plug
to R/AUDIO IN and white plug to L/AU-
DIO 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).
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4
CONNECTING THE
TRANSMITTER TO
POWER
To power the transmitter, insert the
supplied AC adapter into the DC 18V
jack on the back of the transmitter.
Then plug the adapter’s other end into
a standard AC outlet.
Cautions:
• Always disconnect the adapter
from the AC outlet before unplug-
ging the barrel plug from the
transmitter.
• The supplied AC adapter supplies
18 volts and delivers at least 150
milliamps. Its center tip is set to
positive and its barrel plug cor-
rectly fits the transmitter’s DC 18V
jack. Using an adapter that does
not meet these specifications
could damage the transmitter or
the adapter.
INSTALLING THE
RECEIVER’S BATTERIES
To power the receiver, follow these
steps to install three AA batteries (not
supplied). For the best performance
and longest life, we recommend alka-
line batteries, available at your local
RadioShack store.
1. Remove the battery compartment
cover by pushing in the tab and
sliding the cover down.
2. Place three batteries inside the
compartment, as indicated by the
polarity symbols (+ and –) marked
inside.
3. Replace the cover.
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5
When the sound weakens, replace the
batteries.
Cautions:
• Use only fresh batteries of the
required size and type.
• Do not mix old and new batteries,
different types of batteries (stan-
dard, alkaline, or rechargeable),
or rechargeable batteries of differ-
ent capacities.
• Never leave dead or weak batter-
ies in the receiver.
• Dispose of batteries promptly and
properly; do not bury or burn
them.
CONNECTING THE
HEADPHONES TO THE
RECEIVER
To connect the headphones to the re-
ceiver, just insert the headphones’
plug into the jack on the receiver.
USING THE BELT CLIP
For hands-free carrying, slide the re-
ceiver’s belt clip over your belt.
USING THE CHARGER
JACK
To recharge the 3.6-volt, 280 mA re-
chargeable battery used in some
headphones (such as the one provid-
ed with Cat. No. 33-1145 or sold sepa-
rately as RadioShack Unlimited No.
11451549), insert the headphone’s
plug into the CHARGER jack on the
transmitter. The CHARGE indicator
lights.
Recommended Charging Times
Length of Use Charge for
Initial Use 24 hrs
Avera
g
e (3–4 hrs) 10–12 hrs
Extended (5–6 hrs) 16–18 hrs
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6
OPERATION
LISTENING SAFELY
To protect your hearing, follow these
guidelines when you use headphones.
• Since the headphones’ receiver
makes a popping noise each time
you turn it on or off, always turn on
the headphones’ receiver before
putting on the headphones.
Always remove them before you
turn the receiver off.
• Set the volume to the lowest set-
ting before you begin listening.
After you begin listening, adjust
the volume to a comfortable level.
• Do not listen at extremely high
volume levels. Extended high-
volume listening can lead to per-
manent hearing loss.
• Once you set the volume, do not
increase it. Over time, your ears
adapt to the volume level, so a
volume level that does not cause
discomfort might still damage your
hearing.
USING THE SYSTEM
1. Turn on your audio source.
2. If you connected the transmitter to
an audio source’s headphone jack
(or a jack that is controlled by the
audio sources volume control), set
the audio source’s volume control
to the desired level first (about
midway), then rotate LEVEL on
the transmitter until the indicator
at the front of the transmitter
flashes. If the indicator does not
flash, increase the volume of the
source until the indicator flashes.
If you connected the transmitter to
an audio source’s LINE OUTPUT
jack (or a jack that is not con-
trolled by the audio source’s vol-
ume control), rotate LEVEL until
the indicator flashes.
Note: Some audio sources might
not make the indicator flash. For
such sources, simply rotate
LEVEL all the way to the left.
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7
3. Set ON/OFF on the receiver to ON.
4. Rotate TUNING until ST. (stereo)
lights.
5. Put on the headphones and adjust
VOLUME to the desired listening
level.
Note: To adjust the headphones’
fit, pull down or push up on each
end.
6. Adjust TUNING to eliminate inter-
ference from other devices.
If you still hear interference, rotate
FREQ. ADJUST on the transmitter
until the interference is reduced,
then rotate TUNING until the audio
is free from interference.
7. To turn off the system, take off the
headphones, then set ON/OFF on
the receiver to OFF.
Note: Be sure to turn off the sys-
tem when you are not using it.
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8
TROUBLESHOOTING
If you cannot get sound once you
have connected the system:
• Be sure the receiver’s ON/OFF
switch is set to ON.
• Be sure the AC adapter is prop-
erly connected.
• Be sure the audio source is turned
on and tuned to an active fre-
quency.
• If you have connected the trans-
mitter to jacks that are controlled
by the audio source’s volume con-
trol, be sure the control is turned
up.
• Rotate VOLUME on the receiver to
increase the volume.
• Ensure ST. is lit. If not, adjust TUN-
ING on the receiver until ST. lights.
• The receiver’s batteries may be
too low. Replace the batteries.
• Change the position of the trans-
mitter.
If you still have a problem with the
headphone system, contact your local
RadioShack store for assistance.
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9
CARE AND MAINTENANCE
Your Optimus 900 MHz Lightweight Wireless Stereo Headphones are an example
of superior design and craftsmanship. The following suggestions will help you care
for your system so you can enjoy it for years.
Keep the system dry. If it gets wet, wipe it dry immediately. Liquids
might contain minerals that can corrode the electronic circuits.
Use and store the system only in normal temperature environments.
Temperature extremes can shorten the life of electronic devices,
damage batteries, and distort or melt plastic parts.
Keep the system away from dust and dirt, which can cause prema-
ture wear of parts.
Handle the system gently and carefully. Dropping any of its compo-
nents can damage circuit boards and cases and can cause the sys-
tem to work improperly.
Use only fresh batteries of the required size and type. Batteries can
leak chemicals that damage your system’s electronic parts.
Wipe the system with a damp cloth occasionally to keep it looking
new. Do not use harsh chemicals, cleaning solvents, or strong deter-
gents to clean the system.
Modifying or tampering with the system’s internal components can cause a malfunc-
tion and might invalidate your system’s warranty and void your FCC authorization to
operate it. If your system is not performing as it should, take it to your local Ra-
dioShack store for assistance.
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10
THE FCC WANTS YOU
TO KNOW
Your headphone system might cause
TV or radio interference even when it
is operating properly. To determine
whether your headphone system is
causing the interference, turn off your
headphone system. If the interference
goes away, your headphone system is
causing the interference. Try to elimi-
nate the interference by:
• moving your headphone system
away from the receiver
• connecting your headphone sys-
tem to an outlet that is on a differ-
ent electrical circuit from the
receiver
• contacting your local RadioShack
store for help
Note: Your headphone system is sub-
ject to interference from other 900
MHz devices such as wireless head-
phones, cordless phones, or other
wireless speakers that operate on the
same frequencies. If you experience
interference, try moving the head-
phone system away from the other de-
vices.
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SPECIFICATIONS
Transmission Mode ............................ 912.25–914.75 MHz Frequency Modulation
Operation Voltage ..................................................... Transmitter: 18 V AC Adapter
Headphone Receiver: Three AA Batteries
Frequency Response ............................................................................ 50–15K Hz
Distortion ......................................................................................................... < 2%
S/N Ratio ........................................................................................................ 70 dB
Maximum Operation Distance ................................................................... 200 Feet
Dimensions (HWD) ....................................... Transmitter: 61/2× 415/16 × 35/16 Inches
(165 × 125 × 84 mm)
Headphone Receiver: 45/8× 21/2× 13/8Inches
(117 ×64 × 35 mm)
Weight ........................................................................... Transmitter: 9.3 oz (264 g)
Headphone Receiver (w/o Batteries): 31/2oz (99.2 g)
Included Accessories ................................... AC Adapter, 1/8-Inch Y Adapter Cable,
Stereo Audio Cable, 1/4-Inch Plug Adapter
Specifications are typical; individual units might vary. Specifications are subject to
change and improvement without notice.
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RadioShack
A Division of Tandy Corporation
Fort Worth, Texas 76102
09A98 Printed in Hong Kong
Limited Ninety-Day Warranty
This product is warranted by RadioShack against manufacturing defects in material and workman-
ship under normal use for ninety (90) days from the date of purchase from RadioShack company-
owned stores and authorized RadioShack franchisees and dealers. EXCEPT AS PROVIDED
HEREIN, RadioShack MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES,
INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE,
ARE LIMITED IN DURATION TO THE DURATION OF THE WRITTEN LIMITED WARRANTIES
CONTAINED HEREIN. EXCEPT AS PROVIDED HEREIN, RadioShack SHALL HAVE NO LIABIL-
ITY OR RESPONSIBILITY TO CUSTOMER OR ANY OTHER PERSON OR ENTITY WITH RE-
SPECT TO ANY LIABILITY, LOSS OR DAMAGE CAUSED DIRECTLY OR INDIRECTLY BY USE
OR PERFORMANCE OF THE PRODUCT OR ARISING OUT OF ANY BREACH OF THIS WAR-
RANTY, INCLUDING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVE-
NIENCE, LOSS OF TIME, DATA, PROPERTY, REVENUE, OR PROFIT OR ANY INDIRECT,
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, EVEN IF RadioShack HAS BEEN AD-
VISED OF THE POSSIBILITY OF SUCH DAMAGES.
Some states do not allow the limitations on how long an implied warranty lasts or the exclusion of in-
cidental or consequential damages, so the above limitations or exclusions may not apply to you.
In the event of a product defect during the warranty period, take the product and the RadioShack
sales receipt as proof of purchase date to any RadioShack store. RadioShack will, at its option, un-
less otherwise provided by law: (a) correct the defect by product repair without charge for parts and
labor; (b) replace the product with one of the same or similar design; or (c) refund the purchase
price. All replaced parts and products, and products on which a refund is made, become the prop-
erty of RadioShack. New or reconditioned parts and products may be used in the performance of
warranty service. Repaired or replaced parts and products are warranted for the remainder of the
original warranty period. You will be charged for repair or replacement of the product made after the
expiration of the warranty period.
This warranty does not cover: (a) damage or failure caused by or attributable to acts of God, abuse,
accident, misuse, improper or abnormal usage, failure to follow instructions, improper installation or
maintenance, alteration, lightning or other incidence of excess voltage or current; (b) any repairs
other than those provided by a RadioShack Authorized Service Facility; (c) consumables such as
fuses or batteries; (d) cosmetic damage; (e) transportation, shipping or insurance costs; or (f) costs
of product removal, installation, set-up service adjustment or reinstallation.
This warranty gives you specific legal rights, and you may also have other rights which vary from
state to state.
RadioShack Customer Relations, Dept. W, 100 Throckmorton St., Suite 600, Fort Worth, TX 76102
We Service What We Sell
3/97
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