Sony MDR-IF230 - Cordless Stereo Headphones Manual

Welcome

Before operating the unit, please read this manual thoroughly and retain it for future reference.
Some features are:

• These cordless headphones are ideal forthose already used to the Sony Cordless Stereo Headphones system.
  Please use the same type batteries you have in your own model.
• Cordless headphones that allows you tolisten to a program free from the restriction of a cord.
• Broad horizontal listening area that givesyou superb sound virtually anywhere in the room.
• Self-adjusting headband that fits to yourhead perfectly.
• The headphones power turns on and offautomatically every time you put the headphones on and off (Auto power on/ off function).
• The VOL control adjusts the volume level ofboth channels.
• The power source of the headphones can beselected from either a commercially available R6 (size AA) battery or a NC-AA(HJ) rechargeable battery.

Overview

The MDR-IF230 is a cordless stereo headphone which uses infrared rays. Connect the optional transmitter to your Discman, Walkman equipped with a headphone jack or line output jack and you can listen to a program free from the restriction of the headphone cord.

Setting up the headphones

1. Open the battery compartment lid on top of the left housing.
   
   
2. Insert the battery by matching the on the battery to the terminal on the lid.
   
   
3. Close the battery compartment lid.
   

Removing the battery
Open the battery compartment lid, while keeping the housing level and remove the battery from the battery compartment as illustrated below.

Note on the battery
If you already have the MDR-IF230RK or MDR-IF125RK Cordless Stereo Headphones System. You can use the supplied rechargeable battery NC-AA (HJ) with your system. Refer to the operating instruction manual for your Cordless Stereo Headphones System for information on how to recharge the battery.

Battery life

*fully charged

When to replace the battery
Replace the battery with a new one when the POWER indicator dims, and a hissing noise increases.

Listening to a program

1. Turn on the audio/ video equipment connected to the transmitter.
2. Turn on the transmitter. The infrared emitters light up.
3. Put on the headphones and the power turns on automatically. The power indicator glows red when the power turns on.
   
   
4. Adjust the volume.
   

Auto pow er on/off function
When you remove the headphones, the power turns off automatically. Avoid pulling up on the self adjusting band when the headphones are not in use. This might switch the headphones on.

Mute function
If a hissing noise is heard when the infrared rays are obstructed, or the headphones are used outside of the effective range the mute function will be activated and sound will not be heard from the headphones. To restore the sound, move nearer to the transmitter or remove the obstruction.

After listening to a program
Take the headphones off before turning off the transmitter. Otherwise you may hear some noise when the infrared rays are suddenly cut off.

Precautions

• The CE mark on the unit is valid only forproducts marketed in the European Union.
• When the headphones are not to be usedfor a long period of time, remove the battery to avoid damage caused by battery leakage and subsequent corrosion.
• Do not leave the cordless stereoheadphones 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.
If you have any questions or problems concerning the headphones that are not covered in this manual, please consult your nearest Sony dealer.
Be sure to bring the headphones and the transmitter to your Sony dealer when requiring repair work is needed.

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. (Around level 5 or 6 on the volume control should be appropriate.)
The mute function has activated.

• Check if there is any object between the transmitter and the headphones.
• Use the headphones near the transmitter.
• Change the position and angle of the transmitter.

The headphones' power indicator light is weak or turned off. n Replace the headphone battery.

Distortion

If the transmitter is connected to the headphones jack, turn down the volume of the connected audio/video equipment. (Around level 5 or 6 on the volume control should be appropriate.)
The headphones' power indicator light is weak or turned off.
Replace the headphone battery.

Loud backg round noise

Move closer to the transmitter. As you move away from the transmitter, more noise is likely to be heard. This is inherent to infrared ray communication and does not mean that there is a problem with the unit itself.
Check that there is no object between the transmitter and the headphones.
Check that the infrared sensors are not covered with your hands or hair.
Change the position or angle of the transmitter.

• The headphones are used by a window where the sunlight is too strong.
  Draw the curtains/ blinds to shut out the direct sunlight, or use the headphones away form sunlight.

If the transmitter is connected to the headphones jack, turn up the volume of the connected audio/ video equipment. (Around level 5 or 6 on the volume control should be appropriate.)
The headphones' power indicator light is weak or turned off.
Replace the headphone battery.

Replacing the Ear Pads

When the ear pads become dirty or damaged, consult your nearest Sony dealer and replace them as illustrated below.
Remove the old ear pad by pulling it outwards.

Place the new ear pad around the driver unit as illustrated.

Specifications

General
Modulation system: Frequency modulation
Carrier frequency: Right 2.8 MHz
Left 2.3 MHz
Frequency response: 18 – 22,000 Hz
Power source: DC 1.5 V, 1 × R6 (size AA) battery or Ni-Cd rechargeable battery NC-AA (HJ)
Mass: Approx. 180 g (6.4 oz.) including battery

Optional accessories
Infrared transmitter TMR-IF33
Design and specifications are subject to change without notice.