Sony MDR-RF915RK Operating Instructions - Page 1
Sony MDR-RF915RK - Wireless Headphone Manual
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3-233-607-21(1) Wireless Stereo Headphone System Operating Instructions Mode d'emploi N Getting started Unpacking Check that you have the following items: • The headphones • The transmitter • AC power adaptor • Unimatch plug adaptor (stereo mini jack t stereo phone plug) • Connecting cord (phono plugs y stereo mini plug), 1 m 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 Transmitter to AUDIO IN A jacks OFF ON NOISE FILTER B RA AUDIO IN L DC IN 9V 123 CHANNEL Right channel (red) Left channel (white) Connecting cord (supplied) MDR-RF945RK MDR-RF915RK Sony Corporation © 2001 Printed in Korea 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. RECYCLING NICKEL-CADMIUM BATTERIES Nickel-Cadmium batteries are recyclable. You can help preserve our environment by returning your unwanted batteries to your nearest point for collection, recycling or proper disposal. Note: In some areas the disposal of nickelcadmium batteries in household or business trash may be prohibited. RBRC (Rechargeable Battery Recycling Corporation) advises you about spent battery collection by the following phone number. Call toll free number: 1-800-822-8837 (United States and Canada only) Caution: Do not handle damaged or leaking nickel-cadmium batteries. Welcome! Thank you for purchasing the Sony MDR-RF945RK/RF915RK 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 • A compact transmitter with an AC power adaptor (supplied) enables simple charging of the headphone battery. Just by placing the headphones on the transmitter, headphone battery can be charged. • Comfortable Supra-aural headphones with self adjusting head band • Automatic ON/OFF function on headphones to preserve battery power 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. Unimatch plug adaptor (supplied) to headphones jack (stereo phone jack) to headphones jack (stereo mini jack) Discman, MD, WALKMAN*, VCR, etc. B To connect to LINE OUT or REC OUT jacks Transmitter OFF ON NOISE FILTER B RA AUDIO IN L DC IN 9V 123 CHANNEL to AUDIO IN B jack Connecting cord (supplied) Left channel (white) Right channel (red) to LINE OUT or REC OUT jacks Stereo system, VCR, etc. 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. Transmitter to AUDIO IN A jack OFF ON NOISE FILTER B RA AUDIO IN L DC IN 9V 123 CHANNEL Right channel (red) Left channel (white) Connecting cord (supplied) to stereo mini jack TV, etc. 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. 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. Charging the headphone battery Using the headphones for the first time When you use the headphones for the first time, charge the battery in the following manner. 1 Connect the transmitter to a power source. Transmitter to an AC outlet To DC IN 9 V jack AC power adaptor (supplied) 2 Place the headphones on the transmitter. Place the headphone on the transmitter such that the charging pins on the transmitter engage the charging contacts on the bottom of the right-hand housing. The charge indicator on the transmitter will light in green to indicate that the battery is being charged. To recharge the headphone battery after use Since little electric current is used for charging, there is no need to worry about overcharging. Charging and using hours Approx. charging Approx. using time* hours MDR- MDR- RF945RK RF915RK 1 50 minutes 55 minutes 24** 20 hours 23 hours * at 1 kHz, 1 mW + 1 mW output ** The hours required to fully charge empty battery N Operating the system Listening to a program 1 First turn on the audio/video equipment and start playing. 2 Remove the headphones from the transmitter. The transmitter's power indicator will light in red. 3 Select the radio frequency with the CHANNEL selector. 123 CHANNEL 4 When you put on the headphones the headphone power turns on automatically. 5-A Turn up the volume to a moderate level with the VOL control. Press the TUNING button briefly for automatic tuning of the headphones. If you do not receive a clear audio signal, press it again. A MDR-RF945RK TUNING button VOL control 5-B Turn 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. B MDR-RF915RK TUNING control VOL control Try the above steps 3 and 5 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 equipment connected. If it does not detect an audio signal for more than approximately four minutes, the transmitter will stop sending RF signals, and the power indicator turns off. When the transmitter receives an audio signal again, it starts sending the RF signals, and the power indicator will light in red again. If the audio signal is very weak, the transmitter does not send RF signals. If the transmitter is connected to a headphone jack, make sure the volume of the equipment connected is set to 5 - 6 or higher. 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 from your head, 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. Note If a hissing noise is heard move closer to the transmitter. After listening to a program Take the headphones off and rest them away on the transmitter, and recharge them. 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 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 is a characteristic 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. N Additional information Precautions • 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 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. 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. Disposing of the headphones Be sure to remove the built-in rechargeable batteries from the headphones before you dispose of the headphones. First remove the left headphone's ear pad. You will see six screws. Remove the six screws and open the housing. 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. , MDR-RF915RK: Change the radio frequency with the CHANNEL selector on the transmitter, then tune the headphones with the TUNING control. MDR-RF945RK: Change the radio frequency with the CHANNEL selector on the transmitter, then press the TUNING button again. , The mute function is activated. Use the headphones near the transmitter. , The headphones' POWER indicator light is weak or turned off. • Charge the built-in rechargeable battery or if the POWER indicator is still off after charging the built-in rechargeable battery, take the headphones to a Sony dealer for replacement of the rechargeable battery. , If you connect the transmitter to the LINE OUT or REC OUT jack of an audio reproducer, make sure that the NOISE FILTER switch is set to OFF. , Make sure that the NOISE FILTER switch is set to either ON or OFF (If the switch gets stuck between ON and OFF, the sound will be cut off). Distortion , If the transmitter is connected to the headphones jack, turn down the volume of the connected audio/video equipment. , Change the radio frequency with the CHANNEL selector on the transmitter. , The headphones' POWER indicator light is weak or turned off. • Charge the built-in rechargeable battery or if the POWER indicator is still off after charging the built-in rechargeable battery, take the headphones to a Sony dealer for replacement of the rechargeable battery. , 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. , MDR-RF915RK: Change the radio frequency with the CHANNEL selector on the transmitter, then tune the headphones with the TUNING control. MDR-RF945RK: Change the radio frequency with the CHANNEL selector on the transmitter, then press the TUNING button again. , The headphones' POWER indicator light is weak or turned off. • Charge the built-in rechargeable battery or if the POWER indicator is still off after charging the built-in rechargeable battery, take the headphone to a Sony dealer for replacement of the rechargeable battery. , If you connect the transmitter to the 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 913.5 - 914.5 MHz Channel Ch1, Ch2, Ch3 Modulation FM stereo Frequency response 20 - 20,000 Hz Transmitter TMR-RF945R, TMR-RF915R Power source DC 9 V: supplied AC power adaptor Audio input Dimensions Mass phono jacks/stereo mini jack Approx. 150 mm dia. × 108 mm (6 × 4 1/3 in.) (w/h) Approx. 190 g (6.7 oz.) Headphones MDR-RF945R, MDR-RF915R Power source DC 2.4 V: Built-in rechargeable battery Mass Approx. 240 g (8.5 oz.) incl. built-in rechargeable battery Built-in Ni-Cd rechargeable battery Model name NC-AA Voltage 1.2 V Capacity 700 mAh Optional accessory Plug adaptor PC-236HG (stereo mini jack y monaural mini plug) Design and specifications are subject to change without notice.