Sony MDR-RF450RK Bedienungsanleitung

Operating Instructions

Mode d’emploi

Manual de instrucciones

Bedienungsanleitung

Gebruiksaanwijzing

Istruzioni per l’uso

Manual de instruções

Wireless Stereo

Headphone System

3-862-802-12(1)

MDR-RF450RK

WARNING

To prevent fire or shock hazard, do not

expose the unit to rain or moisture.

To avoid electrical shock, do not open the

cabinet. Refer servicing to qualified

personnel only.

Owner’s Record

The model number is located at the bottom of the

transmitter and the left inner side of the

headband.

The serial number is located at the bottom of the

transmitter and in the battery compartment of

the headphones.

Record these numbers in the spaces provided

below. Refer to them whenever you call upon

your Sony dealer regarding this product.

Model No.

Transmitter

Headphones

Serial No.

Transmitter

Headphones

Welcome!

Thank you for purchasing the Sony

MDR-RF450RK Wireless Stereo Headphone

System. Before operating the unit, please read

this manual thoroughly and retain it for future

reference.

Some features are:

• Wireless system that allows you to listen to a

program free from the restriction of a cord.

• High fidelity sound reproduction

• Compact transmitter which operates on AC

power using the supplied AC power adaptor

and which also functions as battery charger

• Comfortable Circum-aural headphones with

self adjusting head band

• Automatic ON/OFF function on headphones

to preserve battery power

• Mute function to avoid noise when no audio

signal is available.

• Either supplied rechargeable batteries or

commercially available R6 (size AA) dry

batteries are used for the power source of the

headphone.

Notes on receiving

performance

The system for this equipment utilizes very high

frequency signals in the 400 MHz band so the

receiving performance may deteriorate due to the

surroundings. The following examples illustrate

conditions that may reduce the possible receiving

range or cause interference with reception.

• Inside a building with walls containing steel

beams.

• Area with many steel file cabinets, etc.

• Area with many electrical appliances capable

of generating electromagnetic noise.

• Transmitter is placed on a metal instrument.

• Area facing roadways.

• Noise or interfering signals exist in the

surroundings due to radio transceivers in

trucks, etc.

• Noise or interfering signals exist in the

surroundings due to wireless communication

systems installed along roadways.

Table of contents

Getting started

Unpacking ............................................... 4

Charging the headphones’ batteries.... 4

Setting up the headphones ................... 6

Setting up the transmitter ..................... 7

Operating the system

Listening to a program .......................... 9

The effective areas of the

transmitter ...................................... 10

Replacing the ear pads ........................ 11

Additional information

Precautions ............................................ 11

Troubleshooting ................................... 12

Specifications ........................................ 13

(Getting started

Unpacking

Check that you have the following items:

• The transmitter

• Ni-Cd rechargeable batteries NC-AA-HJ

• AC power adaptor

• The headphones

• Unimatch plug adaptor (stereo mini jack ˜

stereo phone plug)

• Connecting cord (phono plugs ˜stereo mini

plug), 1 m

Charging the

headphones’ batteries

Using the headphones for the first time

The headphones are powered by either supplied

rechargeable batteries or commercially available

R6 (size AA) batteries.

When you use the headphones with the supplied

rechargeable batteries NC-AA-HJ for the first

time, charge the batteries in the following

manner.

NC-AA-HJ is applicable only for Sony cordless/

wireless headphone systems. Never use for any

other purpose.

1Press the OPEN button to open the

battery compartment lid of the

transmitter.

2Insert two NC-AA-HJ batteries

supplied by matching the ]and }on

the batteries to the ]and }in the

battery compartment.

3Close the battery compartment.

4Connect the transmitter to a power

source.

5Press the OFF/CHG•POWER ON

switch so that the OFF/CHG indicator

lights up green.

Charging starts.

Notes

•Charge only the supplied rechargeable batteries

NC-AA-HJ.

•You cannot recharge other R6 (size AA) rechargeable

batteries (NC-AA etc.) with this unit.

•Be sure to charge both the rechargeable batteries at a

time. The charger cannot charge the batteries one by

one.

•Use only the supplied AC power adaptor. Do not use

any other AC power adaptor.

Polarity of the plug

If the indicator is not lit

Check that the supplied rechargeable batteries

are correctly inserted in the battery compartment

of the transmitter.

To recharge the headphones’ batteries

after use

To charge the batteries, follow steps above.

Since little electric current is used for charging,

there is no need to worry about overcharging.

Charging and using hours

* at 1 kHz, 1 mW + 1 mW output

** The hours required to fully charge empty batteries

Transmitter

to an AC outlet

To DC IN

9 V jack

AC power adaptor

(supplied)

Approx. charging

hours

24**

Approx. using time*

50 minutes

20 hours

Setting up the

headphones

1Open the battery compartment lid on

the left outer side of the head band.

2Insert two charged NC-AA-HJ batteries

by matching the ]and }on the

batteries to the ]and }in the battery

compartment.

3Close the battery compartment lid.

Using the headphones with a

commercially available R6 (size AA) dry

batteries

Install the batteries in the manner as described in

“Setting up the headphones.”

Battery life

* at 1 kHz, 1 mW + 1 mW output

Notes on batteries

To avoid damage to the system caused by battery

leakage and corrosion;

– Install the batteries with the correct polarity.

– Do not try to recharge dry batteries.

– Remove the batteries if the system is not to be

used for a long period of time.

In case of battery leakage, wipe off any deposit in

the battery compartments before installing new

batteries.

Check the remaining power of the

headphones’ battery

Pull up the self adjusting band, and check that

the headphones’ power indicator lights in red.

You can now use the headphones.

Charge the battery or install a new dry battery, if

the power indicator light is weak or turned off

and the sound become distorted or has a lot of

noise.

Notes

•During recharging, the transmitter is turned off.

•When the life of the rechargeable batteries are

shortened by half even after a proper recharging,

replace them with new NC-AA-HJ batteries.

Approx. hours*

Battery

Sony alkaline battery

LR6 (SG)

Sony battery R6P (SR)

bTo connect to LINE OUT or REC OUT

jacks

Setting up the

transmitter

1Connect the transmitter to audio/video

equipment. Select one of the hookups

below depending on the jack type:

aTo connect to a headphones jack

Transmitter

Right channel

(red) Left channel

(white)

Unimatch plug

adaptor

(supplied)

Discman, MD,

WALKMAN*, VCR,

etc.

to headphones

jack (stereo

mini jack)

Connecting cord

(supplied)

to AUDIO IN

A jacks

to headphones

jack (stereo

phone jack)

Transmitter

to AUDIO IN

B jack

Connecting cord

(supplied)

Right channel

(red)

Left channel

(white)

to LINE OUT or REC

OUT jacks

Stereo system, VCR,

etc.

continue to next page

cTo connect to TV etc.

If noise occurs when the transmitter is

connected to your TV or VCR, set the

NOISE FILTER switch to ON.

Notes

• If you connect the transmitter to LINE OUT or

REC OUT jack of an audio reproducer such as an

MD player or CD player, do not set the NOISE

FILTER switch to ON. Otherwise, the volume will

be limited.

• The NOISE FILTER switch effects the sound only

in cases such as connection diagram c. In

diagrams aand bon page 7, the switch has no

effect.

• When the transmitter is placed on or near a TV, it

may pick up a noise.

In such case, place the transmitter away from the

TV.

TV, etc.

to stereo mini jack

Transmitter to AUDIO IN

A jack

Left channel

(white)

Right channel

(red)

Connecting cord

(supplied)

2Connect the transmitter to an AC outlet

using the supplied AC power adaptor.

Notes

•Use only the supplied AC power adaptor. Do not use

any other AC power adaptor.

Polarity of the plug

•When you connect the connecting cord directly to an

earphone jack, the audio signal will not be output

through the right channel. In such a case, use the

separately sold PC-236HG plug adaptor.

•If the connected equipment has the AVLS (Automatic

Volume Limiter System) function, be sure to turn the

function off when using the transmitter. Otherwise,

you will have to turn up the volume of the

headphones, and that may cause noise.

* WALKMAN is a registered trademark of Sony

Corporation.

Continued

(Operating the system

Listening to a program

1First turn on the audio/video

equipment, then turn on the

transmitter.

2Select the radio frequency with the

CHANNEL selector switch.

3Put on the headphones and the power

turns on automatically.

4Turn up the volume to a moderate level

with the VOL control, then tune the

headphones in to the frequency of the

transmitter with the TUNING control

until you can hear the audio signal

loud and clear.

Try the above steps 2 and 4 until the

receiving performance becomes better.

Sending RF signals from the Transmitter

The transmitter starts sending the RF signals

automatically, when it detects audio signals from

the equipments connected.

If it does not detect an audio signal for more than

approximately one minute, the transmitter will

stop sending RF signals.

But the Power indicator remains lighting. When

the transmitter receives an audio signal again, it

starts sending the RF signals.

If the audio signal is very weak, the transmitter

does not send RF signals automatically. In this

case, make sure the volume of the equipments

connected is set to 5 – 6.

You may not hear the beginning of the sound

from the headphones until the transmitter starts

sending the RF signals after detecting an audio

signal.

Note

If the transmitter is connected to the headphones jack of

the source equipment, set the volume of that equipment

as high as possible without distorting the audio signal.

Auto power on/off function

When you remove the headphones, the power

turns off automatically. Do not allow the self

adjusting band to be pulled up, otherwise the

headphones will be switched on.

The power turns on. The power turns off.

continue to next page

VOL control

TUNING control

Mute function

If a hissing noise is heard when the headphones

are used outside of the effective range (see the

next section), the mute function will be activated

and the sound will not be heard from the

headphones. To restore the sound, move near

toward the transmitter.

After listening to a program

Take the headphones off and rest them away on

the holder of the transmitter as shown below.

Note

Do not hang the headphones by the self adjusting band,

otherwise, the self adjusting band will be pulled up and

the headphones will be switched on.

The effective areas of

the transmitter

The optimum distance is up to approximately

100 m without the system picking up some

interference. However, the distance may vary

according to the surroundings and environment.

If the system picks up some noise while using it

within the above mentioned distance, reduce the

distance between the transmitter unit and the

headphones, or select the other channel.

Notes

•When you use the headphones inside the effective

areas of the transmitter, the transmitter can be placed

in any direction from the listener.

•Even within the signal reception area, there are some

spots (dead spot) where the RF signal can not be

received. This characteristics is inherent to RF signals,

and does not indicate malfunction. By slightly moving

the transmitter, location of the dead spot can be

changed.

Self adjusting

band

Holder

Continued

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