Mode d’emploi Sony MDR-RF930K Casque

Mode d’emploi

Operating Instructions

Mode d’emploi

Wireless Stereo

Headphone System

Sony Corporation © 1998 Printed in Japan

MDR-RF930K

3-864-070-22(1)

Setting up the

headphones

1 Open the battery compartment lid

on the left outer side of the head

band.

2 Insert two size AA (R6) batteries by

matching the ] and } on the

batteries to the ] and } in the

battery compartment.

3 Close the battery compartment lid.

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.

– 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.

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.

( Operating the system

Listening to a program

1 Select the radio frequency with the

CHANNEL selector switch.

2 Turn on the audio/video equipment.

3 Put on the headphones and the

power turns on automatically.

4 Turn up the volume to a moderate

level with the VOL control, then

tune the headphones to the

transmitte frequency with the

TUNING control until you can hear

the audio signal loud and clear.

1

2

Try the above steps 1 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 five minutes,

the transmitter will stop sending RF

signals.

But the Power indicator remains lighting

as long as the AC power adaptor is

connected. 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.

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 before turning

off the transmitter. If you turn off the

transmitter first, you may hear some

noise.

The effective areas

of the transmitter

The optimum distance is up to

approximately 150 feet (46 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.

Replacing the ear pads

When the ear pads become dirty or

damaged, you can get replacements

from your Sony dealer. Replace them as

illustrated below.

1 Remove the old ear pad by pulling it

out of the groove on the housing.

2 Place the new ear pad on the driver

unit and insert the edge of the pad

into the groove as illustrated.

Make sure that the entire edge of the ear

pad is securely inserted into the groove.

( Additional information

Precautions

• When the headphones are not to be

used for a long period of time, remove

the batteries to avoid damage caused

by battery leakage and subsequent

corrosion.

• When the transmitter is not to be used

for a long period of time, disconnect

the AC power adaptor from the AC

outlet holding the plug. Do not pull

on the cord.

Also remove the batteries to avoid

damage caused by battery leakage and

subsequent corrosion.

• Do not leave the wireless stereo

headphone system in a location subject

to direct sunlight, heat or moisture.

Notes on headphones

Preventing hearing damage

Avoid using headphones at high

volume. Hearing experts advise against

continuous, loud and extended play. If

you experience a ringing in your ears,

reduce the volume or discontinue use.

Caring for others

Keep the volume at a moderate level.

This will allow you to hear outside

sounds and to be considerate to the

people around you.

b To connect to LINE OUT or REC OUT

jacks

c To connect to TV, etc.

If noise occurs when the transmitter is

connected to the headphone jack of

your TV or VCR, set the NOISE

FILTER switch to ON.

Notes

•If you connect the transmitter to LINE OUT

or REC OUT jack, 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 a and b, 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.

2 Connect the transmitter to an AC

outlet using the supplied AC power

adaptor.

If you connect the AC power

adaptor, power of the transmitter

will be turned on.

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.

•Do not place the transmitter near a fluorescent

lamp, etc. when using the system.

* WALKMAN is a registered trademark of Sony

Corporation.

( Getting started

Unpacking

Check that you have the following

items:

• The transmitter

• AC power adaptor

• Connecting cord (phono plugs ˜

stereo mini plug), 1 m

• The headphones

• Unimatch plug adaptor (stereo mini

jack n stereo phone plug)

Setting up the

transmitter

1 Connect the transmitter to audio/

video equipment. Select one of the

hookups below depending on the

jack type:

a To connect to a headphones jack

Notes on receiving

performance

The system for this equipment utilizes very

high frequency signals in the 900 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.

English

Note

This device complies with RSS-210 of

Industry Canada. Operation is subject

to the following two conditions: (1) this

device may not cause interference, and

(2) this device must accept any

interference, including interference that

may cause undesired operation of the

device.

Welcome!

Thank you for purchasing the Sony

MDR-RF930K 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 within 150 feet

(46 m) from the transmitter.

• High fidelity sound reproduction

• Compact transmitter which operates

on AC power using the supplied AC

power adaptor

• Comfortable Supra-aural headphones

with the 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.

Transmitter

Left channel

(white)

Right channel

(red)

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)

TV, etc.

to stereo mini jack

Transmitter

to AUDIO

IN A jack

Left channel

(white)

Right

channel

(red)

Connecting

cord (supplied)

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.

Transmitter

Battery

Sony alkaline battery

SG (LR6)

Sony battery SR (R6P)

Approx. hours*

60

30

Transmitter

If you have any questions or problems

concerning the system that are not

covered in this manual, please consult

the nearest Sony dealer.

Be sure to bring the headphones and the

transmitter to the Sony dealer when

requiring repair work.

Troubleshooting

No sound/Muffled sound

/ Turn on the transmitter first, then put on the

headphones.

/ Check the connection of the audio/video

equipment or the AC power adaptor.

/ Check that the audio/video equipment is

turned on.

/ Turn up the volume on the connected audio/

video equipment, if the transmitter is

connected to the headphones jack.

/ Select the radio frequency with the CHANNEL

selector, then tune the headphones in the

frequency of the transmitter with the TUNING

control.

/ The mute function is activated.

Use the headphones near the transmitter.

/ Replace both batteries of headphones.

/ If you connect the transmitter to LINE OUT or

REC OUT jack of an audio reproducer, make

sure that the NOISE FILTER switch is set to

OFF.

Distortion

/ If the transmitter is connected to the

headphones jack, turn down the volume of the

connected audio/video equipment.

/ Select the radio frequency with the CHANNEL

selector.

/ Replace both batteries of headphones.

/ If you connect the transmitter to LINE OUT or

REC OUT jack of an audio reproducer, make

sure that the NOISE FILTER switch is set to

OFF.

Loud background noise

/ Move closer to the transmitter. As you move

away from the transmitter, more noise is likely

to be heard.

/ If the transmitter is connected to the

headphones jack, turn up the volume of the

connected audio/video equipment.

/ Select the radio frequency with the CHANNEL

selector, then tune in the frequency of the

transmitter with the TUNING control.

/ If noise is heard when the transmitter is

hooked to the TV headphones jack, try

connecting from LINE OUT.

/ Replace both batteries of headphones.

/ If you connect the transmitter to LINE OUT or

REC OUT jack of an audio reproducer, make

sure that the NOISE FILTER switch is set to

OFF.

Specifications

General

Carrier frequency 913.0 – 915.0 MHz

Channel Ch1, Ch2, Ch3

Modulation FM stereo

Frequency response

20 – 20,000 Hz

Transmitter

RF power Less than 94 dBµV/m at 3 m

Power source DC 9 V: supplied AC power

adaptor

Audio input phono jacks/stereo mini jack

Dimensions Approx. 120 mm dia × 87 mm

(4

3

/4 × 3

1

/2 in.) (w/h)

Mass Approx. 125 g (4.4 oz.)

Headphones

Power source DC 3 V: 2 × size AA (R6) battery

Mass Approx. 215 g (7.6 oz.) incl.

batteries

Optional accessories

Plug adaptor PC-236HG (stereo mini jack

˜ monaural mini plug)

Design and specifications are subject to change

without notice.

TUNING

control

VOL control

Évaluation

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