MDRDS4000 - Earphones SONY - Free user manual and instructions

USER MANUAL MDRDS4000 SONY

WARNING To prevent fire or shock hazard, do not expose the unit to rain or moisture. To prevent fire or shock hazard, do not place objects filled with liquids, such as vases, on the apparatus. To avoid electrical shock, do not open the cabinet. Refer servicing to qualified personnel only. Do not install the appliance in a confined space, such as a bookcase or built-in cabinet. For the customers in the USA Owner’s Record The model number is located at the bottom of the processor and the left inner side of the headband. The serial number is located at the bottom of the processor and the inner side of the battery compartment. Record these numbers in the spaces provided below. Refer to them whenever you call upon your Sony dealer regarding this product. Model No. MDR-DS4000 Processor DP-IF4000 Headphones MDR-IF4000 Serial No. Processor Headphones

NOTICE FOR THE CUSTOMERS IN THE

U.S.A. NOTE This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: – Reorient or relocate the receiving antenna. – Increase the separation between the equipment and receiver. – Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. – Consult the dealer or an experienced radio/ TV technician for help. You are cautioned that any changes or modifications not expressly approved in this manual could void your authority to operate this equipment.3

For the customers in the USA and Canada

RECYCLING NICKEL METAL

HYDRIDE BATTERIES Nickel Metal Hydridebatteries are recyclable.You can help preserve ourenvironment by returningyour used rechargeablebatteries to the collectionand recycling locationnearest you.For more information regarding recyclingof rechargeable batteries, call toll free1-800-822-8837, or visit http://www.rbrc.org/Caution: Do not handle damaged orleaking Nickel Metal Hydride batteries.

• Listening to the Sound of a Connected Component p. 16
• Enjoying with Additional Headphones p. 21
• Replacing the Ear Pads p. 22
• Troubleshooting p. 23
• Precautions p. 26
• Specifications Disposal of OldElectrical & ElectronicEquipment(Applicable in theEuropean Union andother Europeancountries withseparate collectionsystems)This symbol on the product or on itspackaging indicates that this productshall not be treated as household waste.Instead it shall be handed over to theapplicable collection point for therecycling of electrical and electronicequipment. By ensuring this product isdisposed of correctly, you will helpprevent potential negative consequencesfor the environment and human health,which could otherwise be caused byinappropriate waste handling of thisproduct. The recycling of materials willhelp to conserve natural resources. Formore detailed information aboutrecycling of this product, please contactyour local city office, your householdwaste disposal service or the shop whereyou purchased the product.4 p. 27

Main Features The MDR-DS4000 is a digital surround headphone system using digital infrared transmission. You can enjoy multi-channel surround sound with headphones by simply connecting the digital surround processor to a DVD player or a Digital TV, a Digital Broadcasting Satellite Receiver, etc., with the supplied optical digital connecting cable.

• Cordless headphones using a digital infrared transmission system which reproduce uncompressed transmission sound, resistant to external noise and interference.

• Compatibility of MDR-DS4000 with a wide variety of audio formats. Compatible with Dolby Digital*, Dolby Pro Logic II*, DTS*, and MPEG-2 AAC* formats. (Proprietary algorithm allows full reproduction of "Dolby Digital Surround EX" software.)

• Stunning 5.1ch surround sound capability based on newly developed XD technology.

• Battery is automatically charged by placing the headphones on the processor.

• Built-in audio compression function for easy listening even in the bursting and whispering sound by compressing the dynamic range.

• Built-in digital through terminal. Signal to the DIGITAL IN terminal is parallel routed through, for convenient integration into your existing system with no need to reconfigure your hookup.

• Self-adjusting mechanism headband eliminating the need for adjustment.

• Auto Power On/Off function automatically turns on the headphones when you put them on, and turns them off when they are removed.

• Uses either rechargeable nickel-metal hydride batteries (supplied) or commercially available (size AAA) alkaline batteries.

• The digital surround processor for this system incorporates the Dolby Digital decoder, the Dolby Pro Logic II decoder, the DTS decoder and the MPEG-2 AAC decoder. Manufactured under licence from Dolby Laboratories and Digital Theater Systems, Inc. “Dolby,” “Pro Logic,” the “AAC” logo and the double-D symbol are trademarks of Dolby Laboratories. “DTS” and “DTS VIRTUAL ” are trademarks of Digital Theater Systems, Inc. AAC patent marking Pat. 5,848,391; 5,291,557; 5,451,954; 5 400 433; 5,222,189; 5,357,594; 5 752 225; 5,394,473; 5,583,962; 5,274,740; 5,633,981; 5 297 236; 4,914,701; 5,235,671; 07/640,550; 5,579,430; 08/678,666; 98/03037; 97/02875; 97/02874; 98/03036; 5,227,788; 5,285,498; 5,481,614; 5,592,584; 5,781,888; 08/039,478; 08/211,547; 5,703,999; 08/557,046; 08/894,844 The validity of the CE marking is restricted to only those countries where it is legally enforced, mainly in the countries EEA (European Economic Area).Preparation

Checking the Components and Accessories Before setting up the system, check that all of the components are included. Cordless stereo headphones MDR-IF4000 (1)Processor DP-IF4000 (1) 1 Preparation AC power adaptor (1)Optical digital connecting cable(rectangular type y rectangular type) (1)Rechargeable nickel-metal hydride batteriesBP-HP550 (2)Preparation

Front Panel of the Processor

Rear Panel of the Processor

1 ATT (attenuator) switch Set this switch to “0dB” if the volume is too low at analogue input. Normally, this switch should be set to “–8dB.” 2 LINE IN jacks (see page 14 for details) Connect the audio output jacks on audio or video component (sold separately), such as a video cassette player or TV, to these jacks. 3 DIGITAL IN jack (see page 13 for details) Connect a DVD player, Digital Broadcasting Satellite Receiver, or other digital component (sold separately) to this jack. 4 DIGITAL OUT jack (see page 13 for details) Connected components' digital signal integrity retained when installed. 5 DC IN 9V jack Connect the supplied AC power adaptor to this jack. (Be sure to use the supplied AC power adaptor. Using products with different plug polarity or other characteristics can cause a malfunction.)Preparation

1 Ear pad (left) 2 Battery case button 3 Battery case Press the button of the left housing to open the battery compartment lid. This battery case is for the rechargeable nickel-metal hydride batteries (supplied) or commercially available (size AAA) alkaline batteries only. 4 Infrared sensor There are infrared sensors in two locations on both sides. 5 Self-adjusting band The headphones automatically turn on when you put them on. 6 VOL (Volume) control Use to adjust the volume. 7 Ear pad (right) 8 POWER indicator By pulling up the self-adjusting band, the indicator lights red when battery power is sufficient. Headphone Part DescriptionsPreparation

Charging the Supplied Rechargeable Nickel-metal Hydride batteries The supplied rechargeable nickel-metal hydride batteries are not charged from the first time you use them. Be sure to charge them before use. To charge the headphones, place them on the processor. Inserting the supplied rechargeable nickel- metal hydride batteries 1 Press the button of the left housing to open the battery compartment lid. The battery compartment lid comes off. 2 Insert the supplied rechargeable nickel-metal hydride batteries into the battery compartment matching the 3 terminal on the batteries to the 3 marks in the compartment. Do not attempt to charge any other kind of battery with this unit. 3 Close the battery compartment lid. ButtonPreparation

Charging 1 If your AC power adaptor is equipped with a voltage selector, first be sure that it is set to the correct voltage for your area before connecting it to an AC outlet. 2 If your AC power adaptor is equipped with an on/off switch, set it to ON. The power is supplied to the processor. 3 Connect the supplied AC power adaptor to the processor. Notes

• Be sure to use the supplied AC power adaptor. Using AC adaptors with different plug polarity or other characteristics can cause product failure.

• Be sure to always use the supplied AC power adaptor. Even AC power adaptors having the same voltage and plug polarity can damage this product due to the current capacity or other factors. On/off switchTo an AC outletAC poweradaptor(supplied)To DC IN 9V jackProcessorUnified polarity plugPreparation

4 Rest the headphones on the processor so that the headphones’ contact point meets the processor’s contact pin while making sure that the CHG indicator lights up. It takes approx. 16 hours to fully charge the battery (the CHG indicator goes off when charging is complete). When placing the headphones on the processor, be sure to hold them with both hands so that the right and left housings are horizontal. Place the headphones vertically on the processor then tilt them back until a click is heard. If the CHG indicator is not lit Check if the right and left headphones are rested on the processor correctly. The indicator will not light up if the headphones’ contact point does not meet the processor’s contact pin. In this case, remove the headphones and place them on the processor again so that the indicator lights up. To recharge the headphone battery after use Place the headphones on the processor after use. The CHG indicator lights up, and the DECODE MODE indicator goes off, and then charging starts. Since the built-in timer recognizes when charging is complete (approx. 16 hours), there is no need to remove the headphones from the processor after charging has completed. Notes

• The processor automatically turns off while charging the batteries.

• This system is designed to charge only the supplied rechargeable batteries, type BP-HP550 for safety. Note that other types of rechargeable batteries cannot be charged with this system.

• If dry batteries are installed, they cannot be charged.

• Do not attempt to use the supplied BP-HP550 rechargeable batteries for other components. They are for use with this system only.

• Charge in an environmental temperature of between 0˚C and 40˚C (between 32˚F and 104˚F).

• Do not touch the contact pins of the processor. If a contact pin becomes dirty, charge may not be possible. Charging and usage hours Approx. charging hours Approx. usage time*

at 1 kHz, 1 mW + 1 mW output

hours required to fully charge empty batteries

Time stated above may vary, depending on the temperature or conditions of use. RighthousingLeft housingContactpointContact pinPreparation

Using the headphones with alkaline batteries (sold separately) Commercially available (size AAA) alkaline batteries can also be used to power the headphones. Install the batteries in the same manner as described in “Inserting the supplied rechargeable nickel-metal hydride batteries” (page 9). When dry batteries are installed, the battery charge function is not activated. Battery life Battery Approx. hours*

at 1 kHz, 1 mW + 1 mW output

Time stated above may vary, depending on the temperature or conditions of use. Notes on Batteries

• Do not charge a dry battery.

• Do not carry a battery together with coins or metallic objects. Heat can be generated by the battery if its positive and negative terminals are accidentally shorted.

• When you are not going to use the unit for a long time, remove the batteries to avoid damage from battery leakage or corrosion. See “Checking the remaining battery power” for details about checking the remaining battery power. Checking the remaining battery power Pull up the self-adjusting band and check the POWER indicator located on the right housing. The batteries are still serviceable when the indicator lights red. Charge the rechargeable batteries or install new alkaline batteries if the POWER indicator light dims, flashes, or the sound becomes distorted or intermittent. Note The rechargeable nickel-metal hydride batteries should be replaced with new ones when they last only half the expected time, after a full charge has been performed. The rechargeable batteries, type BP-HP550, are not commercially available. You can order the batteries from the store where you purchased this system, or at your nearest Sony dealer. POWERindicatorConnection

Connecting the Headphone System Connecting the processor to digital components Use the supplied optical digital connecting cable to connect the optical digital output jack*

on a DVD player, Digital Broadcasting Satellite Receiver or other digital component*

to the DIGITAL IN jack (black) of the processor. The connected AV components may require to be set up for optical digital output. Read their operating instructions. When connecting the processor to an AV amplifier, etc., connect the DIGITAL OUT jack (Red) and external optical digital input jack using the optical digital connecting cable (sold separately). Notes

• The optical digital connecting cable is an extremely high-precision device and is sensitive to jolts and external pressure. Therefore, be careful when inserting and removing the cable plug.• The digital input for the processor does not support sampling frequencies of 96 kHz. Set thedigital output setting for the DVD player to 48 kHz when using this system. Noise may beheard when a 96 kHz digital signal is input.

If the connected equipment supports PCM output only, all surround sound effects will beprocessed by DOLBY PRO LOGIC II.

Connection to the optical digital output jack on your personal computer is not guaranteed towork with this system. DTS

• A DTS-compatible DVD player is required for playback of DVDs recorded in DTS audio. (Formore details, see the instruction manual of your DVD player.)• When playing CDs recorded in DTS format, noise may occur when fast forwarding orrewinding. This is not a malfunction.• If the DTS digital output is set to “OFF” on the DVD player, no sound may be heard even if theDTS output is selected in the DVD menu.• No sound may be heard when a DVD player and this unit is analogue-connected. In this case,use a digital connection. 1 Connection (Continued) To DIGITAL INjack (Black)ProcessorDVD player, Digital BroadcastingSatellite Receiver or other digitalcomponent having an opticaldigital output jackTo optical digitaloutput jackOptical digital connectingcable (supplied)Match the orientation ofthe plug with the jack, andthen insert until the plugfits into place.Optical digital connectingcable (sold separately)To DIGITAL OUTjack (Red)Equipment with opticaldigital input terminal suchas an AV amplifierTo optical digitalinput jackConnection

Connecting cables (sold separately) Use the Optical digital connecting cable POC-20AP (mini-plug y rectangular plug) when connecting the optical digital output mini-jack on portable DVD players, portable CD players, or other digital components to the DIGITAL IN jack. Optical digital selector (sold separately) Use of the optical digital selector SB-RX100P (4-line input, 3-line output) is recommended when connecting more than one digital component. Notes on optical digital connecting cable

• Do not drop objects on the optical digital connecting cable or expose the cable to shock.

• Grasp the plug to connect or disconnect the cable.

• Be sure that the ends of the optical digital connecting cable are kept clean. Dust at the ends of the cable can degrade performance.

• When storing the system, attach the cap to the end of the plug and be careful not to fold or bend the optical digital connecting cable with a bend radius less than 25 mm (1 inch). Connecting the processor to analogue components Use an audio cord (sold separately) to connect to the audio output jacks on a VCR, TV, or other component to the LINE IN (L/R) jacks on the processor. Connecting cables (sold separately) Use the connecting cable RK-G129 (stereo mini-plug y pin plug × 2) when connecting a stereo mini-jack (line out jack or headphones jack) to the LINE IN jacks. In this case, set the volume on the player at a medium level. Noise can occur if the volume on the player is set too low. See “Specifications: Recommended accessories” (page 27) for details about other connecting cables (sold separately). To audio output jacksAudio cord(sold separately)Audio right(R, red)To LINE IN jacksAudio left (L, white)Audio left (white)Audio right (red)VCR, TV, or othercomponentProcessorThe bend radius of the opticaldigital connecting cable should beno less than 25 mm

8dB Setting the input level If the volume is low using the analogue input, set the ATT (attenuator) switch to “0dB.” Setting Connected components 0dB TV, portable components, and other components with a low output level –8dB Other components (initial settings) Notes

• Be sure to lower the volume before setting the ATT switch.

• If audio input to the LINE IN jacks is distorted (sometimes, noise can be heard at the same time), set the ATT switch to “–8dB.”Operation

Listening to the Sound of a Connected Component Before starting operation, be sure to read “Connecting the Headphone System” (pages 13 to 15) and make the proper connections. 1 Turn on the component connected to the processor. 2 Remove the headphones from the processor. The processor turns on automatically and, after about 3 seconds, the infraredemitters grow. Then the DECODE MODE indicator lights up, depending on theaudio signal input from the connected audio or video component and the settingof the EFFECT switch. 3 Put on the headphones. The POWER indicator lights red, and the headphones automatically turn on.Be sure to match the right and left side of the headphones with your ears andwear the headphones at the correct angle so that the Auto Power On/Off functionworks correctly. 1 Operation POWERDVD player, Digital BroadcastingSatellite Receiver or other audioor video componentPOWERindicatorOperation

4 Slide the INPUT SELECT switch to select the component you want to listen to. Position of switch Selected sound source DIGITAL Sound of the component connected to DIGITAL IN jack.ANALOG Sound of the component connected to LINE IN jacks. Note To listen to dual audio (MAIN/SUB) sound sources, connect to the LINE IN jacks, and then select the sound source you want to listen to on the player, TV, or other component. 5 Start playback of the component selected in step 4. 6 Slide a next switch to select the desired sound field. EFFECT switch Position of switch Sound field and suitable sound source OFF Normal playback of the headphones.CINEMA Produces the kind of surround sound that is found in a typical movietheatre. Suitable for movie sound sources.MUSIC Produces the kind of sound field that would be found in a listeningroom with good acoustics. Suitable for music sources. Note The volume of the headphones may vary, depending on the input signal and the setting of the EFFECT switch. (Continued) EFFECT MUSIC OFF CINEMAOperation

DECODE MODE indicator The processor automatically identifies the format of the input audio signal and the corresponding indicator lights up. Switch the audio between Dolby Digital, DTS, MPEG-2 AAC, etc., on the connected equipment (DVD player, etc.).

• DOLBY DIGITAL: Input signal recorded in the DOLBY DIGITAL format.

• DOLBY PRO LOGIC II: Analogue input signal, digital input PCM signal, or Dolby Digital 2-channel signal processed by DOLBY PRO LOGIC II. (If the sound field is set to ”OFF,” it is not processed by DOLBY PRO LOGIC II.)

• DTS: Input signal recorded in the DTS format.

• MPEG-2 AAC: Input signal recorded in the MPEG-2 AAC format. Note If the equipment connected to the DIGITAL IN jack is not playing back (fast forwarding, rewinding, etc.), the DECODE MODE indicator may not light up correctly. COMPRESSION Switch Position of switch Playback Effect OFF When the EFFECT switch is selected, the sound mode changes to the selected effect. ON This function maintains overall level of program material: explosive sounds are attenuated while lower level sounds (dialogue, etc.) are enhanced. COMPRESSION OFF ONdynamic rangedynamic rangewhisper, background noisewhisper, background noiseexplosionexplosionstandarddialoguedialogueinput signalcompressionoutput signal Illustration of the compression process Dynamic range compression by built-in DSP processor Startling level Easy to hear level Difficult to hear levelOperation

(Continued) 7 Adjust the volume. Notes

• When watching films, be careful not to raise the volume too high in quiet scenes. You may hurt your ears when a loud scene is played.

• You may hear some noise when you disconnect the AC power adaptor from the processor before removing the headphones.

• If the infrared sensors are covered by your hands when adjusting the volume, the Muting function will be activated and volume cannot be adjusted. To adjust the volume, move nearer toward the processor or orient the infrared sensors on the left housing towards the processor. The headphones automatically turn off when they are removed — Auto Power On/Off function Do not pull up the self-adjusting band when not in use, as this will consume the battery power. Transition time between modes When sliding switches on the processor to change to new modes, the transition time between modes may vary. This is due to differences in system control between modes. If no sound is heard from the headphones The sound output from the headphones is cut off if the Muting function is automatically activated when the headphones are outside the infrared transmission area, or when the infrared signals are interrupted. The Muting function is automatically cancelled when you get closer to the processor or there is no longer anything obstructing the path of the infrared signals. Self-adjusting band Raise thevolumeLower thevolumeOperation

Infrared transmission area The approximate infrared transmission area from the processor is shown in the illustration below. Notes

• Because this system uses infrared signals, sound may be interrupted if these signals are obstructed. This is due to the infrared signal characteristics, and is not a malfunction.

• Do not cover the infrared sensors with your hands or hair.

• When you use the headphones inside the area in the illustration above, the processor can be placed in front, behind or by the side of you.

• Any noise you hear through the headphones may vary depending on the processor position and room conditions. It is recommended that you place the processor in a location that produces the clearest sound.

• Do not use this system in areas exposed to direct sunlight or strong light. The sound may be interrupted.

• Plasma displays may interfere with normal operation of this system.

• Mixed signals may result if the processor is used with other processors or transmitters. If an audio signal is not input for 10 minutes Infrared signal emission from the processor automatically stops when an audio signal is not input for 10 minutes. The infrared signals are automatically emitted when an audio signal is input again. The emission of the infrared signals may stop when an extremely low sound is emitted for about 10 minutes during analogue input. If this happens, raise the volume of the connected audio or video component and lower the volume of the headphones. If signal noise is output from a component connected to the LINE IN jacks, infrared signal emission may not stop. Notes

• The brightness of the infrared emitter on the digital surround processor may vary. However, this does not affect the transmission area.

• The headphones should be used within the infrared transmission area (see “Infrared transmission area”).

• The surround sound effect may not be obtained from sound sources that do not incorporate video, such as music CDs.

• This system simulates the average HRTF* common to most people. However, the effect can differ from person to person since the HRTF can vary between individuals.

• Head Related Transfer Function Digital surroundprocessorApprox. 3 m(10 ft)Infrared signalApprox.7 m (23 ft) 45° 45° Approx.3 m (10 ft)Operation

Enjoying with Additional Headphones In this system, by using additional MDR-IF4000 cordless infrared headphones (sold separately), more than one person can enjoy the surround sound experience wirelessly at the same time. Charge additional headphones with the processor of this system.

• There is no limit to the number of headphones that can be used within the infrared transmission area. Notes

• The processor turns off automatically while charging. Remove these headphones from the processor when using other headphones.

• Because this unit employs a digital infrared transmission system, cordless infrared analogue headphones (MDR-IF3000, etc.) cannot be used.

• This unit is not compatible with the MDR-DS8000 since the infrared transmission method is different. The MDR-IF8000 cannot be used. ProcessorMDR-IF4000 (sold separately)Operation

Replacing the Ear Pads The ear pads are replaceable. If the ear pads become dirty or worn out, replace them as illustrated below. The ear pad is not commercially available. You can order replacements from the store where you purchased this system, or at your nearest Sony dealer. 1 Remove the old ear pad by pulling it off. 2 Place the new ear pad around the housing.Additional Information

1 Additional Information Troubleshooting If you run into any problems using this headphone system, use the following checklist. Should any problem persist, consult your nearest Sony dealer. Symptom Cause and remedy No sound , Check the connection between the processor and the AV component. , Check that the signal is not being input to the digital out jack by mistake when digital input is selected. , Check that the connected AV component's optical digital output is set to "ON" when selecting digital input. , Turn on the AV component connected to the processor, and start the playback. , Check that the INPUT SELECT switch on the processor is set to the component you want to listen to. , If you connect the processor to an AV component using the headphone jacks, raise the volume level on the connected AV component. , Make sure you are wearing the headphones correctly. , Raise the headphone volume. , The Muting function is activated.

• Check if there is any obstruction between the processor and the headphones.

• Use the headphones near the processor.

• Change the position or angle of the processor.

• If a plasma display is placed nearby, place the system farther away from it. , The headphones’ POWER indicator light dims, flashes, goes off, or the sound becomes distorted or intermittent.

• Charge the rechargeable batteries if they are weak, or replace alkaline batteries with new ones. If the POWER indicator is still off after charging the batteries, take the headphones to a Sony dealer. , You are trying to play a DTS audio track on a DVD player that does not support DTS.

• Either use a DVD player that supports DTS, or select a Dolby Digital or PCM audio track. , You are playing back a DVD disc recorded in DTS when DTS digital output setting for the DVD player (including game machines) is “OFF.”

• See the instruction manual of your DVD player, and change the DTS digital output setting to “ON.” , You are playing back a DVD disc recorded in DTS when the DVD player (including game machines) and the processor are analogue-connected.

• Use the digital connection. (Analogue sound may not be output from the DVD player.) , When you have another processor or transmitter, check if more than one processor or transmitter is being used at the same time.

• Turn off other processor or transmitter or move to a place outside the range of other processor or transmitter. (Continued)Additional Information

Symptom Cause and remedy Distorted or intermittent sound (sometimes with noise) Low sound Loud background noise The sound cuts off The surround sound effect is not obtained The DOLBY DIGITAL indicator does not turn on , The headphones’ POWER indicator light dims, flashes, goes off, or the sound becomes distorted or intermittent.

• Charge the rechargeable batteries if they are weak, or replace alkaline batteries with new ones. If the POWER indicator is still off after charging the batteries, take the headphones to a Sony dealer. , Check if there is any obstruction between the processor and the headphones. , Check that the infrared sensors are not covered with your hands or hair. , If you use the headphones by a window where the sunlight is too strong, draw the curtains/blinds to shut out the direct sunlight, or use the headphones away from the sunlight. , Change the position or angle of the processor. , When analogue input is selected, change the ATT switch on the processor to "–8dB." , If you connect the processor to an AV component using the headphone jacks, lower the volume level on the connected AV component. , When using DTS audio sources, set the EFFECT switch on the processor to “CINEMA” or “MUSIC” mode (page 17, 18). , When analogue input is selected, change the ATT switch on the processor to "0dB." , If you connect the processor to an AV component using the headphone jacks, raise the volume level on the connected AV component. , Raise the headphone volume. , If you connect the processor to an AV component using the headphone jacks, raise the volume level on the connected AV component. , The headphones’ POWER indicator light dims, flashes, goes off, or the sound becomes distorted or intermittent.

• Charge the rechargeable batteries if they are weak, or replace alkaline batteries with new ones. If the POWER indicator is still off after charging the batteries, take the headphones to a Sony dealer. , If a plasma display is placed nearby, place the system farther away from it. , The processor stops sending signals, if 10 minutes passes and no signal has been input.

• Set the ATT switch on the processor to “0dB.”

• If you connect the processor to an AV component using the headphone jacks, raise the volume level on the connected AV component. , Set the EFFECT switch on the processor to “CINEMA” or “MUSIC” mode (page 17,18). , The audio being played is not a multichannel signal.

• The surround effect does not work for monaural sound sources. , The digital audio output setting for the DVD player (including game machines) may be set to “PCM.”

• See the instruction manual of your DVD player, and change the setting (such as “Dolby Digital/PCM” or “Dolby Digital”) for usage with components having built-in Dolby Digital decoders. , Playback signals are not recorded in Dolby Digital format. , The audio for the chapter being played is not a Dolby Digital signal.Additional Information

Symptom Cause and remedy The DOLBY PRO LOGIC II indicator does not turn on The DOLBY PRO LOGIC II indicator turn on The DTS indicator does not turn on MPEG-2 AAC indicator does not light up. The batteries cannot be charged The CHG indicator does not turn off. Infrared signal emission does not stop (when the INPUT SELECT switch on the processor is set to “ANALOG”) No signal from optical digital output Bilingual sound cannot be selected when using digital input. (Both MAIN and SUB can be heard at the same time.) , The EFFECT switch on the processor is set to “OFF.” , Analogue input signal, digital input PCM signal, Dolby Digital 2-channel signal or MPEG-2 AAC 2-channel signal is not input. , The EFFECT switch on the processor is set to “CINEMA” or “MUSIC” mode. , Analogue input signal, digital input PCM signal, Dolby Digital 2-channel signal or MPEG-2 AAC 2-channel signal is input. , The DTS digital output setting on the DVD player (including game machines) is set to “OFF.”

• See the instruction manual of your DVD player, and change the DTS digital output setting to “ON.” , Playback signals are not recorded in DTS format. , The audio for the chapter being played is not a DTS signal. , The DVD player does not support DTS format.

• Use a DVD player that supports DTS. , Playback signals are not recorded in MPEG-2 AAC format. , Check if the CHG indicator turns on. If not, put the headphones on the processor correctly so that the CHG indicator turns on. , Dry batteries are installed.

• Insert the supplied rechargeable nickel-metal hydride batteries. , Rechargeable batteries other than the supplied are installed.

• Insert the supplied rechargeable nickel-metal hydride batteries. , The CHG indicator remains lit during charging (approx. 16 hours) by the built-in timer after the headphone is placed on the processor. , Signal noise is output from the connected analogue component.

• Unplug the connected analogue component, or set the INPUT SELECT switch on the processor to "DIGITAL," and make sure playback of the component connected to the DIGITAL IN jack is stopped. , No power supplied to the processor.

• Connect the processor to a power source. , No playback sound from the connected external digital unit at the optical input jack.

• Check the external unit is playing back. , Connect the analogue out to the LINE IN jack, and select the sound on the connected component.Additional Information

• Do not drop, hit, or otherwise expose the processor or headphones to strong shock of any kind. This could damage the product.

• Do not disassemble or attempt to open any parts of the system. On power sources and placement

• If you are not going to use the system for a long time, unplug the AC power adaptor from the AC outlet. When removing the plug, grip the AC power adaptor. Do not pull on the cord.

• Do not place the system in any of the following locations. – Location exposed to direct sunlight, near a heater, or other extremely high- temperature location – Dusty location – On an unsteady or inclined surface –Location exposed to large amounts of vibration – Bathroom or other high-humidity locations On headphones Act considerately When the volume is too high, the sound leaks outside the headphones. Be careful not to raise the volume so high that it bothers people around you. There is a tendency to raise the volume when using in noisy places. However, for reasons of safety, it is advised to keep the volume at a level whereby you can still hear sounds around you. On cleaning Use a soft cloth slightly moistened with mild detergent solution. Do not use solvents such as thinner, benzene or alcohol as these may damage the surface. When the product breaks

• When the product breaks, or if a foreign object gets inside the unit, immediately turn off the power and consult your nearest Sony dealer.

• When taking the system to a Sony dealer, be sure to take both the headphones and processor. PrecautionsAdditional Information

Specifications Supplied accessories AC power adaptor (9 V) (1) Rechargeable nickel-metal hydride batteries BP-HP550 (550 mAh min.) (2) Optical digital connecting cable (optical rectangular plug y optical rectangular plug, 1.5 m) (1) Operating Instructions (this manual) (1) Recommended accessories Optical digital connecting cable POC-15AB (1.5 m) (mini-plug y rectangular plug) Design and specifications are subject to change without notice. Digital surround processor (DP-IF4000) Decoder functions Dolby Digital Dolby Pro Logic II DTS MPEG-2 AAC Virtual surround function OFF CINEMA MUSIC Compression function OFF

Transmission distance Approx. 7 m (23 ft) to the front Transmission range 12 – 24,000 Hz Distortion rate 1% or less (1 kHz) Audio inputs Optical digital input (rectangular-type) × 1 Analogue input (pin jack left/right) × 1 Audio output Optical digital output (rectangular-type) × 1 Power requirements DC 9 V (from the supplied AC power adaptor) Dimensions Approx. 160 × 160 × 200 mm

/8 in) (w/h/d) Mass Approx. 400 g (15 oz) Cordless stereo headphones (MDR-IF4000) Playback frequency range 10 – 22,000 Hz Power requirements Rechargeable nickel- metal hydride batteries (supplied) or commercially available (size AAA) alkaline batteries Mass Approx. 300 g (11 oz) (including the supplied rechargeable nickel-metal hydride batteries)2