MDRIF420RK - Earphones SONY - Free user manual and instructions

USER MANUAL MDRIF420RK SONY

Cordless Stereo Headphone System

Operating Instructions page 2

To avoid electrical shock, do not open the cabinet. Refer servicing to qualified personnel only.

WARNING

You are cautioned that any changes or modifications not expressly approved in this manual could void your authority to operate this equipment.

Owner's Record

The model number is located at the bottom of the transmitter and the right 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-IF420RK/MDR-IF520RK

Cordless Stereo Headphone System.

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

Some features are:

• Cordless system that allows you to listen to a program free from the restriction of a cord.
• The infrared rays from the transmitter cover a broad horizontal listening area with a maximum distance of 10m .
• Self-adjusting headband for fitting your head perfectly.
• The power of the headphones turns on and off automatically every time you put the headphones on and off (Auto power on/off function).
• Surround effect that enables you to enjoy the sound which simulates the sound field such as concert hall or theater. (MDR-IF-520RK only)
• The VOL control adjusts the volume level of both channels. Furthermore, you can adjust the balance between the left and right channels with the BALANCE control (MDR-IF520RK only)
• The power source of the headphones can be selected from either a supplied rechargeable battery or a commercially available R6 (size AA) dry battery.

About the infrared rays communication

The illustration below shows the approximate area covered by the infrared rays emitted from the transmitter.

Notes

• This system utilizes infrared rays for communication so noise (hissing) can be heard from the headphones as you move farther away from the transmitter. The sound will also be cutoff and noise will be heard if the infrared rays are blocked. These are characteristics of infrared ray communication and do not indicate malfunction.
• The infrared rays will not penetrate walls or opaque glass, therefore, be sure to stay within sight of the transmitter.
• When you use the headphones inside the area illustrated in the diagram, the transmitter can be placed in the front, behind or by the side of the listener.
  The sound you hear varies according to your position and the transmitter position. Try finding a position which yields the best sound.
• Do not cover the infrared sensors with your hands or hair.

Table of contents

Getting started

Unpacking 4

Charging the headphones' battery 4

Setting up the transmitter 6

Operating the system

Listening to a program 8

Replacing the ear pads 12

Additional information

Precautions 12

Troubleshooting 13

Specifications 15

Unpacking

Check that you have the following items:

The transmitter

• AC power adaptor

• Connecting cord (phono plugs stereo mini plug)

• Unimatch plug adaptor (stereo mini jack stereo phone plug)

The headphones

• Ni-Cd rechargeable battery NC-AA (HJ)

Charging the headphones' battery

Using the headphones for the first time

The headphones are powered by either a supplied rechargeable battery NC-AA (HJ) or a commercially available R6 (size AA) battery. When you use the headphones with the supplied rechargeable battery NC-AA (HJ) for the first time, charge the battery in the following manner. NC-AA (HJ) is applicable only for Sony cordless/wireless headphone systems. Never use for any other purpose.

1 Open the battery compartment lid on the left inner side of the hanger.

2 Install the supplied rechargeable battery with its + and - matched to those of the battery compartment. Do not use a rechargeable battery other than the supplied one.

3 Close the battery compartment lid.

4 Connect the supplied AC power adaptor to the transmitter.

5 Rest the headphones on the transmitter so that the contact pins fit into the contact holes on the headphones. The charging indicator lights.

Notes

• Use only the supplied rechargeable battery NC-AA (HJ).
• You cannot recharge other R6 (size AA) rechargeable battery (NC-AA etc.) with this unit.

When the indicator is not lit

Check the connection to make sure that the contact pins are properly fitted into the contact holes on the headphones, or if the headphones are rested on the transmitter correctly.

To recharge the headphones' battery after use

To charge the battery, follow steps 4 and 5.

Since little electric current is used for charging, there is no need to worry about overcharging.

Charging and using hours

Approx. charging hours	Approx. using hours*
	MDR-IF420RK MDR-IF520RK
1	11 hour. 15 min.
24**	24 30

• at 1 kHz, 1 mW+1 mW output
  ** the hours required to fully charge an empty battery

Using the headphones with a commercially available R6 (size AA) dry battery

Install the battery in the manner as described in steps 1 through 3 of "Charging the headphones' battery." When a R6 (size AA) dry battery is installed, the battery charge function is not activated.

Battery life*

Battery	Approx. hours
	MDR-IF420RK MDR-IF520RK
Sony alkaline battery LR 6 (SG)	70 80
Sony battery R6P (SR)	35 40

• at 1 kHz, 1 mW+1 mW output

Check the remaining power of the headphones' battery

Pull up the suspender, 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 automatically.
• When the life of the rechargeable battery is shortened by half even after a proper recharging, take the headphone set to a Sony dealer and have the old rechargeable battery replaced by a new one.

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

Set the INPUT SOURCE selector to PHONES.

b To connect to LINE OUT or REC OUT jacks

Set the INPUT SOURCE selector to LINE.

2 If your AC power adaptor is equipped with a voltage selector, before connecting the AC power adaptor to an AC outlet, set it to the operating voltage in your area with a screw driver.

3 Connect the transmitter to a power source.

Notes

• Do not connect to the AUDIO IN A jack and B jacks at the same time. If you do so, the audio signals may be mixed.
• Use only the supplied AC power adaptor. Do not use any other AC power adaptor.

Polarity of the plug

• If the plug of the AC power adaptor does not fit in the AC outlet, use the supplied AC plug adaptor.
• 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.
• WALKMAN is a registered trademark of Sony Corporation.

Listening to a program

1 Turn on the audio/video equipment connected to the transmitter.

When the audio signal is input, the transmitter turns on automatically and the infrared emitters glow. If the transmitter is connected to the headphone jack, set the volume control of the audio source equipment as high as possible but not so high that the audio signal gets distorted.

2 Put on the headphones and the power turns on automatically. The power indicator glows red when the power turns on.

3 Adjust the volume.

Adjust the balance between the left and right channels. (MDR-IF520RK only)

Auto power on/off function

When you remove the headphones, the power turns off automatically. Do not allow the suspender to be pulled up, otherwise the headphones will be switched 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 (see page 3), the mute function will be activated and the sound will not be heard from the headphones. To restore the sound, move nearer toward the transmitter or remove the obstruction.

When no audio signal is received for more than approximately five minutes

The transmitter will be turned off automatically.

After listening to a program

Take the headphones off and rest them away onto the transmitter. The transmitter power will automatically be turned off. If the supplied rechargeable battery is used for the headphones, the charging indicator on the transmitter lights up. The rechargeable headphone battery is continuously charged when the headphones are placed on the transmitter.

Since little electric current is used for charging, there is no need to worry about overcharging.

As MDR-IF420RK/MDR-IF520RK Cordless Stereo Headphone System is not affected by the memory effect of the Ni-Cd battery, it is advisable that the headphones are rested on the transmitter whenever not in use so that the headphones' battery is always charged.

When a R6 (size AA) dry battery is used for the headphones, the battery charge function is not activated.

Note

The infrared emitters light up when the transmitter is turned on. The brightness of the emitters may not be uniform, however, this is not a malfunction.

Enjoying the TV or VCR with the simulated surround effect (MDR-IF520RK only)

When using an audio equipment with a stereo speakers

With this headphone system, you can enjoy surround sound by listening to the sound from the speakers of a connected stereo TV or audio equipment and to the rear sound from the headphones created by the built-in surround circuit.

To listen to the sound with this effect, set up the equipment as follows.

1 Connect the transmitter to audio/video equipment. Select one of the hookups below.

Set the INPUT SOURCE selector to LINE.

① Connecting to a stereo TV with an audio output jack

② Connecting to a stereo video equipment or laser disc player, etc.

Stereo video, Laser disc player, etc.

When all the audio output jacks of the equipment that you are connecting to are used, set up as follows.

③ Connecting to an audio equipment

Note

Do not connect to the headphones jack of a TV or an audio equipment. If you do so, front speaker sound will be lost, and the surround effect can not be obtained.

2 Open the housing cap as described below.

In doing so, you can listen to the sound from the speakers on TV or audio system as well as from the headphones in order to obtain the full surround effect.

3 Press the SURROUND button to activate the surround effect and then play the connected equipment.

To cancel the surround effect, press that button again.

Notes

The surround effect does not work in the following cases:

The source sound is monaural.

The source sound is bilingual.

• When you use the surround effect, do not connect the transmitter to the surround terminals of the audio/video equipment. If you do so, the surround effect may not be obtained or sound may not be output.

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 housing and insert the edge of the pad onto the groove as illustrated.

Make sure that the entire edge of the ear pad is securely inserted into the groove.

Precautions

The CE mark on the unit is valid only for products marketed in the European Union.
- 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.
- Do not leave the cordless stereo headphones 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.

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

Problem	Solution
No sound/Muffled sound	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.
	The mute function is 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. · Charge the rechargeable battery because the headphones' battery is weak, or if the power indicator is still off after charging the battery, take the headphones to a Sony dealer for a replacement of the rechargeable battery. · If you are using the conventional dry battery, replace it with a new one.
	Check if the INPUT SOURCE selector is set to the right position.

Problem	Solution
No sound/Muffled sound	Check the position of the BALANCE control (MDR-IF 520RK only).
	Check the position of the SURROUND button (MDR-IF520RK only).
Distortion	If the transmitter is connected to the headphones jack, turn down the volume of the connected audio/video equipment.
	The headphones' power indicator light is weak or turned off. • Charge the rechargeable battery because the headphones' battery is weak, or if the power indicator is still off after charging the battery, take the headphones to a Sony dealer for a replacement of the rechargeable battery. • If you are using the conventional dry battery, replace it with a new one.
	Check if the INPUT SOURCE selector is set to the right position.
Loud background 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/ blind to shut out the direct sunlight, or use the headphones away from the sunlight.
	If the transmitter is connected to the headphones jack, turn up the volume of the connected audio/video equipment.
	The headphones' power indicator light is weak or turned off. • Charge the rechargeable battery because the headphones' battery is weak, or if the power indicator is still off after charging the battery, take the headphones to a Sony dealer for a replacement of the rechargeable battery. • If you are using the conventional dry battery, replace it with a new one.

Problem	Solution
Loud background noise	Noise is heard from the connected audio equipment. ·Check if the INPUT SOURCE selector is set to the right position. ·Disconnect the connecting cord with the power of the transmitter on and check if the noise is heard from the headphones. If the noise disappears, the connected equipment is the cause to make that noise. ·When using more than two transmitters, turn off the power of the second transmitter or move it so that the area covered by the infrared rays does not overlap each other.
Surround effect (MDR-IF520RK) cannot be obtained.	Press the SURROUND button. Check that the input signal is stereo. Check that the unit is connected to audio/video equipment properly. Open the housing cap.
The battery cannot be charged.	Check if the charging indicator lights on. If not, put the headphones on the transmitter correctly so that the charging indicator lights on. The dry battery is installed. ·Install the supplied rechargeable battery. The rechargeable battery that is not supplied is installed. ·Install the supplied rechargeable battery.

Specifications

General

Modulation system

Frequency modulation

Carrier frequency

Right 2.8 MHz

Left 2.3 MHz

Frequency response

12-24,000 Hz (MDR-IF420RK)

10 - 24,000 Hz (MDR-IF520RK)

Transmitter

Power source DC IN 9V jack accepts power supplied from the AC power adaptor for use on the following voltages:

Where purchased	Operating voltage
U.S.A./Canada	120 V AC, 60 Hz
U.K.	240 V AC, 50 Hz
European countries	220 – 230V AC, 50 Hz
Japan (except for Japanese domestic model)	110 V/120 V/220 V/240 V AC, 50/60 Hz
Other countries	220 – 230 V AC, 50/60 Hz or 120 V AC, 60 Hz

Audio input Phono jacks/stereo mini jack

Dimensions Approx. 121 × 260 × 135 ~mm

(4^7 / 8× 10^1 / 4× 5^3 / _8in)(w / h / d)

Mass Approx. 190g (6.7 oz)

Headphones

Power source Supplied Ni-Cd rechargeable battery R6 (size AA) battery

Mass Approx. 320g (11.3 oz)
(MDR-IF420RK)
Approx. 390g (13.8 oz)
(MDR-IF520RK)
including the supplied Ni-Cd battery

Supplied Ni-Cd rechargeable battery

Model name NC-AA (HJ)

Type Ni-Cd

Voltage 1.2 V

Capacity 600mAh

Optional accessories

Sony alkaline battery LR6 (SG)

Sony battery R6P (SR)

Plug adaptor PC-236HG

Design and specifications are subject to change without notice.

AVERTISSEMENT

Raccordement aux prises LINE OUT ou REC OUT

Pile rechargeable Ni-Cd

Fournie Pile R6 (format AA)

Poids 320g (11,3 on) (MDR-IF420RK)

Env. 390g (13,8 on) (MDR-

IF520RK)

Pile rechargeable Ni-Cd fournie

Nom du modele NC-AA (HJ)

Type Ni-Cd

Tension 1,2 V

Capacité 600mAh

Accessoires en option

Pile alkaline Sony LR6 (SG)

Pile Sony R6P (SR)