Help Guide
MDR-EX31BN Top >
Getting Started
BLUETOOTH
One-touch
connection (NFC)
Music
Phone calls
Multi point
connection
Troubleshooting
Important
information
Contents list
Getting Started
Before First Use
Before first use
Features and location of parts
Features
Location and function of parts
Power
Charging the headset
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Getting Started
BLUETOOTH
One-touch
connection (NFC)
Music
Phone calls
Multi point
connection
Troubleshooting
Important
information
Contents list
BLUETOOTH
BLUETOOTH
What is BLUETOOTH wireless technology?
What you can do with BLUETOOTH function
Steps to BLUETOOTH function
BLUETOOTH connection
Pairing and connecting with an Android smartphone
Connecting with a paired Android smartphone
Pairing and connecting with an iPhone
Connecting with a paired iPhone
Pairing and connecting with other BLUETOOTH
devices
Connecting with a paired BLUETOOTH device
Indications of BLUETOOTH function
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Getting Started
BLUETOOTH
One-touch
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Music
Phone calls
Multi point
connection
Troubleshooting
Important
information
Contents list
One-touch connection (NFC)
One-touch connection (NFC)
Compatible smartphones
Preparation on the smartphone
About “NFC Easy Connect” App
One-touch connection
Connecting with a smartphone by one-touch
functions
Disconnecting the smartphone by one-touch
functions
Switching the device by one-touch functions
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Music
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Important
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Contents list
Music
Listening to music
Listening to music
Selecting the sound quality mode of music playback
Using the noise canceling
Using the AI noise canceling
Controlling the audio device
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Getting Started
BLUETOOTH
One-touch
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Music
Phone calls
Multi point
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Troubleshooting
Important
information
Contents list
Multi point connection
Multi point connection
Connecting the headset with a music player and a
smartphone (mobile phone)
Connecting the headset with 2 Android smartphones
Connecting the headset with an Android smartphone
and an iPhone
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Getting Started
BLUETOOTH
One-touch
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Music
Phone calls
Multi point
connection
Troubleshooting
Important
information
Contents list
Troubleshooting
To deal with a trouble
What can I do to solve a problem?
Possible causes of symptoms
Table of contents for symptoms and possible
causes
Power and charging
BLUETOOTH connection
One-touch connection (NFC)
Music
Phone calls
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Getting Started
BLUETOOTH
One-touch
connection (NFC)
Music
Phone calls
Multi point
connection
Troubleshooting
Important
information
Contents list
Contents list
Getting Started
Before First Use
Before first use
Features and location of parts
Features
Location and function of parts
Power
Charging the headset
BLUETOOTH
BLUETOOTH
What is BLUETOOTH wireless technology?
What you can do with BLUETOOTH function
Steps to BLUETOOTH function
BLUETOOTH connection
Pairing and connecting with an Android smartphone
Connecting with a paired Android smartphone
Pairing and connecting with an iPhone
Connecting with a paired iPhone
Pairing and connecting with other BLUETOOTH
devices
Connecting with a paired BLUETOOTH device
Indications of BLUETOOTH function
One-touch connection (NFC)
One-touch connection (NFC)
Compatible smartphones
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Preparation on the smartphone
About “NFC Easy Connect” App
One-touch connection
Connecting with a smartphone by one-touch
functions
Disconnecting the smartphone by one-touch
functions
Switching the device by one-touch functions
Music
Listening to music
Listening to music
Selecting the sound quality mode of music playback
Using the noise canceling
Using the AI noise canceling
Controlling the audio device
Phone calls
Phone calls
Making a call
Receiving a call
Controlling the smartphone or mobile phone
Multi point connection
Multi point connection
Connecting the headset with a music player and a
smartphone (mobile phone)
Connecting the headset with 2 Android smartphones
Connecting the headset with an Android smartphone
and an iPhone
Troubleshooting
To deal with a trouble
What can I do to solve a problem?
Possible causes of symptoms
Table of contents for symptoms and possible
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Getting Started
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Music
Phone calls
Multi point
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Troubleshooting
Important
information
Contents list
Before first use
In addition to this Help Guide, read the printed manuals supplied:
“Quick Start Guide” and “Reference Guide.”
Quick Start Guide
This covers initial settings and basic operations.
Reference Guide
This includes information about using your wireless stereo headset
safely, and specifications of your wireless stereo headset.
For information about the customer support Web site, access:
http://www.sony.net/
About battery charging
See “Charging the headset” on how to charge the battery.
Features
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Getting Started
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Music
Phone calls
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Important
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Contents list
Features
Digital noise canceling headphones with Sony’s unique DNC
Software Engine
Creation of a high-precision canceling signal delivers outstanding
noise canceling performance.
Automatic AI (Artificial Intelligence) Noise Canceling function.
Automatic selection of the optimal noise canceling mode based on
intelligent analysis of environmental ambient noise.
Enjoy music from BLUETOOTH Stereo–enabled music players
and mobile phones.
Embedded microphone enables hands–free conversation from
BLUETOOTH-enabled mobile phone.
AAC, aptX Codec supported
Plays music with high quality sound.
One-touch connection (NFC)
Location and function of parts
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Location and function of parts
Functions of buttons, indicators, and other parts on your wireless
stereo headset are explained here.
Stereo mini jack
Indicator
Lights up in red or blue to indicate the power or communication
status of the headset.
POWER ( ) (play/pause) button
Controls various call and playback functions.
Microphone
Micro-USB port [Details]
Connect a computer to this port with the supplied micro-USB
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cable to charge the headset.
Built-in antenna
The BLUETOOTH antenna is built into the headset.
RESET button [Details]
Press the button with a pointing object, such as a pin, to reset the
headset.
Strap hole
Clip
N mark [Details]
/ buttons
Controls various functions when listening to music.
VOL (volume) +/– buttons
The + button has a tactile dot.
Noise canceling switch
You can set the noise canceling function [Details] or the AI noise
canceling function [Details].
Charging the headset
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Charging the headset
The headset contains a lithium ion rechargeable battery, which should
be charged before using the headset for the first time.
System requirements for battery charge using USB
Personal Computer with pre-installed with any of the following
operating systems and USB port:
Operating Systems
(when using Windows)
Windows® 8 / Windows® 8 Pro
Windows® 7
Home Basic / Home Premium / Professional / Ultimate
Windows Vista® (Service Pack 2 or later)
Home Basic / Home Premium / Business / Ultimate
Windows® XP (Service Pack 3 or later)
Home Edition / Professional / Media Center Edition 2004 / Media
Center Edition 2005
(when using Macintosh)
Mac OS X (version.10.3 or later)
Charging the headset
1. Open the cover of the micro-USB port.
2. Connect the supplied micro-USB cable to the headset, and then
connect the other end to a computer booted.
Make sure that you connect the plug of the micro-USB cable in
the direction as shown in the illustration below.
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Charging starts when the headset and the computer are connected.
Make sure that the indicator (red) lights up. Charging is completed in
about 2.5 hours* and the indicator (red) goes off automatically.
* Time required to charge the empty battery to its full capacity
Notes
Use the micro-USB cable supplied. You may not be able to charge
the headset with other cables.
If the headset is not used for a long time, the indicator (red) may
not light up when you connect the micro-USB cable to charge the
headset. In this case, do not disconnect the micro-USB cable from
the headset and wait until the indicator (red) lights up.
Tips
If the micro-USB cable is connected to a computer while the
headset is turned on, the headset will be turned off automatically.
The headset cannot be turned on while charging the battery.
Caution
If the headset detects a problem while charging, the indicator (red)
may turn off, although charging is not complete.
Check for the following causes:
Ambient temperature exceeds the range of 5 °C – 35 °C (41 °F –
95 °F).
There is a problem with the battery.
In this case, charge again within the above-mentioned
temperature range. If the problem persists, consult your nearest
Sony dealer.
Notes
If the headset is not used for a long time, the battery may be
quickly depleted, however, after a few recharges, the battery life
will improve.
Even if you do not intend to use the headset for a long time,
charge the battery to its full capacity once every 6 months to
maintain its performance.
If the headset is not used for a long time, it may take longer to
charge the battery.
If the life of the built-in rechargeable battery drops to half the
normal length, the battery should be replaced. Consult your
nearest Sony dealer for replacement of the rechargeable battery.
Avoid exposure to temperature extremes, direct sunlight, moisture,
sand, dust or mechanical shock. Never leave the headset in a car
parked in the sun.
If the computer enters into hibernation mode while connected to
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the headset, charging will not be completed properly. Check the
setting of the computer before charging. The indicator (red) will go
off automatically even if the computer enters into hibernation
mode. Charge the headset again in this case.
Use the supplied micro-USB cable only, and connect directly to a
computer. Charging will not be completed properly by an indirect
connection, such as via a USB hub.
Usage hours
Status
Approx. usage hours
NC On NC Off
Music playback time (SBC/AAC) (up to) 9.0 hours 10.5 hours
Music Playback time (aptX) (up to) 6.0 hours 7.0 hours
Communication time (up to) 6.5 hours 7.5 hours
Standby time (up to) 30 hours 100 hours
Time stated above may vary, depending on ambient temperature or
conditions of use.
Checking the remaining battery
When you turn on the headset by pressing the
POWER button, the
indicator (red) flashes. You can check the remaining battery by the
number of times the indicator (red) flashes.
Indicator (red) Status
3 times Full
2 times Mid
1 time Low (needs to charge)
When the battery is almost empty
The indicator turns red. When the battery becomes empty, the
headset sounds a beep and turns off automatically.
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Contents list
What is BLUETOOTH wireless
technology?
Bluetooth® wireless technology is a short-range wireless technology
that enables wireless data communication between digital devices,
such as a computer or digital camera. BLUETOOTH wireless
technology operates within a range of about 10 meters (about 30
feet).
Connecting 2 devices as necessary is common, but some devices can
be connected to multiple devices at the same time.
You do not need to use a cable for connection, nor is it necessary for
the devices to face one another, such is the case with infrared
technology. For example, you can use such a device in a bag or
pocket.
BLUETOOTH standard is an international standard supported by
thousands of companies all over the world, and employed by various
companies worldwide.
Communication System and Compatible BLUETOOTH
Profiles of the headset
Profile is standardization of the function for each BLUETOOTH device
specification. The headset supports the following BLUETOOTH
version and profiles:
Communication System :
BLUETOOTH Specification Ver. 3.0
Compatible BLUETOOTH Profiles:
A2DP (Advanced Audio Distribution Profile): Transmitting or
receiving audio content of high-quality.
AVRCP (Audio Video Remote Control Profile): Controlling A/V
equipment; pausing, stopping, starting playback, etc.
HSP (Headset Profile)*: Talking on the phone/Operating the
phone.
HFP (Hands-free Profile)*: Talking on the phone/Operating the
phone by hands-free.
* When you use a BLUETOOTH mobile phone supported by both
HFP (Hands-free Profile) and HSP (Headset Profile), set it to
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HFP.
Notes
To use the BLUETOOTH function, the BLUETOOTH device to be
connected requires the same profile as that of the headset. Even if
the device has the same profile, functions may vary depending on
the specifications.
Due to the characteristic of BLUETOOTH wireless technology, the
sound played on the headset is slightly delayed from the sound
played on the BLUETOOTH device during talking on the telephone
or listening to the music.
Do not use the BLUETOOTH function on an airplane. The radio
waves may cause malfunction of the airplane and result in
hazardous accidents.
What you can do with BLUETOOTH function
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What you can do with BLUETOOTH
function
The headset uses BLUETOOTH wireless technology. You can enjoy
music wirelessly from a smartphone, mobile phone, or music player.
Also, you can make or receive a call by operating the headset.
Listening to music
You can enjoy music wirelessly from a smartphone, mobile phone, or
music player. [Details]
Talking on the phone
You can make and receive a call with your hands free, while leaving
your smartphone or mobile phone in your bag or pocket. [Details]
Steps to BLUETOOTH function
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Steps to BLUETOOTH function
To listen to music played, or make a call on a BLUETOOTH
smartphone or mobile phone, you must establish a BLUETOOTH
connection between the headset and the BLUETOOTH device.
There are following 2 ways to establish a BLUETOOTH connection:
One-touch connection (NFC): You can connect the headset with
a device by one touch using the NFC function. [Details]
Paring the headset with a BLUETOOTH device by operating the
BLUETOOTH device [Details]
In the case of the one-touch connection, you can perform steps 1 and
2 below by a one-touch operation.
1. Register (pair) a BLUETOOTH device (smartphone, mobile
phone, etc.) and the headset with each other.
2. Use the BLUETOOTH device to make a BLUETOOTH
connection.
3. Listen to music played on the BLUETOOTH device, or make and
receive a call by operating the headset.
The headset supports the following BLUETOOTH version and
profiles:
Communication System :
BLUETOOTH Specification Ver. 3.0
Compatible BLUETOOTH Profiles:
A2DP (Advanced Audio Distribution Profile): Transmitting or
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receiving audio content of high-quality.
AVRCP (Audio Video Remote Control Profile): Controlling A/V
equipment; pausing, stopping, starting playback, etc.
HSP (Headset Profile)*: Talking on the phone/Operating the
phone.
HFP (Hands-free Profile)*: Talking on the phone/Operating the
phone by hands-free.
* When you use a BLUETOOTH smartphone or mobile phone
supported by both HFP (Hands-free Profile) and HSP (Headset
Profile), set it to HFP.
Notes
To use the BLUETOOTH function, the BLUETOOTH device to be
connected requires the same profile as that of the headset. Even if
the device has the same profile, functions may vary depending on
the specifications.
Due to the characteristic of BLUETOOTH wireless technology, the
sound played on the headset is slightly delayed from the sound
played on the BLUETOOTH device during talking on the telephone
or listening to the music.
Do not use the BLUETOOTH function on an airplane. The radio
waves may cause malfunction of the airplane and result in
hazardous accidents.
Pairing and connecting with an Android smartphone
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Pairing and connecting with an
Android smartphone
It is necessary to pair BLUETOOTH devices to establish a
BLUETOOTH connection. When pairing the headset with a
smartphone, place the smartphone within 1 meter (3 feet) of the
headset.
1. Enter pairing mode on the headset.
Press and hold the
POWER button for more than 7 seconds.
Make sure that the indicator flashes blue and red alternately after
you release the button.
Note
If pairing is not established within about 5 minutes, pairing mode
will be cancelled and the headset will turn off. In this case, start
over from step 1.
2. Select the BLUETOOTH setting on the smartphone.
Select [Settings]
[Bluetooth].
3. Turn on the BLUETOOTH function on the smartphone.
Touch the button next to [Bluetooth] to turn on [Bluetooth].
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4. Search for this headset on the smartphone.
Touch [Bluetooth]
[Search for devices].
5. Touch [MDR-EX31BN].
If passkey input is required, input “0000.”
A Passkey may be called a “Passcode,” a “PIN code,” a “PIN
number,” or a “Password.”
The above procedure is an example. For details, refer to the
manual supplied with your smartphone.
The headset and the smartphone are paired each other and
connected.
If they are not connected, see step 2 of “Connecting with a paired
Android smartphone.”
Tip
To delete all pairing information, see “What can I do to solve a
problem?”
Note
Once BLUETOOTH devices are paired, there is no need for
pairing again, except in the following cases:
Pairing information is deleted after repair, etc.
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The headset is paired with 9 or more devices. The headset can
be paired with up to 8 devices; if a new device is paired after 8
devices have been paired, the device whose latest connection
time is the oldest among the 8 paired devices is replaced by the
new one.
When recognition of the headset by the device to be connected
is deleted.
The headset is initialized. [Details] All pairing information is
deleted.
Connecting with a paired Android smartphone
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Connecting with a paired Android
smartphone
1. Turn on the headset.
Press and hold the
POWER button for about 2 seconds.
Make sure that the indicator (blue) flashes after you release the
button.
If the smartphone was connected with the headset the last
time, an HFP/HSP connection is made when you turn on both
devices. To make an A2DP connection (music playback),
press the
POWER ( ) button again.
Check the connecting status on the smartphone. If not
connected, proceed to step 2.
2. Make the BLUETOOTH connection from the smartphone.
Touch [Settings]
[Bluetooth]. Make sure that [Bluetooth] is set
to on, then touch [MDR-EX31BN].
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Pairing and connecting with an
iPhone
It is necessary to pair BLUETOOTH devices to establish a
BLUETOOTH connection. When pairing the headset with an iPhone,
place the iPhone within 1 meter (3 feet) of the headset.
1. Enter pairing mode on the headset.
Press and hold the
POWER button for more than 7 seconds.
Make sure that the indicator flashes blue and red alternately after
you release the button.
Note
If pairing is not established within about 5 minutes, pairing mode
will be cancelled and the headset will turn off. In this case, start
over from step 1.
2. Select the BLUETOOTH setting on the iPhone.
Select [Settings]
[Bluetooth].
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3. Turn on the BLUETOOTH function on the iPhone.
Touch [OFF] to change it to [ON].
4. Touch [MDR-EX31BN].
If passkey input is required, input “0000.”
A Passkey may be called a “Passcode,” a “PIN code,” a “PIN
number,” or a “Password.”
The above procedure is an example. For details, refer to the
manual supplied with your iPhone.
The headset and the iPhone are paired each other and
connected.
If they are not connected, see step 2 of “Connecting with a paired
iPhone.”
Tip
To delete all pairing information, see “What can I do to solve a
problem?”
Note
Once BLUETOOTH devices are paired, there is no need for
pairing again, except in the following cases:
Pairing information is deleted after repair, etc.
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The headset is paired with 9 or more devices. The headset can
be paired with up to 8 devices; if a new device is paired after 8
devices have been paired, the device whose latest connection
time is the oldest among the 8 paired devices is replaced by the
new one.
When recognition of the headset by the device to be connected
is deleted.
The headset is initialized. [Details] All pairing information is
deleted.
Connecting with a paired iPhone
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Important
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Contents list
Connecting with a paired iPhone
1. Turn on the headset.
Press and hold the
POWER button for about 2 seconds.
Make sure that the indicator (blue) flashes after you release the
button.
If the iPhone was connected with the headset the last time, an
HFP/HSP connection is made when you turn on both devices.
To make an A2DP connection (music playback), press the
POWER ( ) button again.
Check the connecting status on the iPhone. If not connected,
proceed to step 2.
2. Make the BLUETOOTH connection from the iPhone.
Touch [Settings]
[Bluetooth]. Make sure that [ON] is selected,
then touch [MDR-EX31BN].
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Pairing and connecting with other
BLUETOOTH devices
It is necessary to pair BLUETOOTH devices to establish a
BLUETOOTH connection. When pairing the headset with a
BLUETOOTH device, place the BLUETOOTH device within 1 meter
(3 feet) of the headset.
1. Enter pairing mode on the headset.
Press and hold the
POWER button for more than 7 seconds.
Make sure that the indicator flashes blue and red alternately after
you release the button.
Note
If pairing is not established within about 5 minutes, pairing mode
will be cancelled and the headset will turn off. In this case, start
over from step 1.
2. Perform the pairing procedure on the BLUETOOTH device to
search for this headset.
“MDR-EX31BN” will be displayed on the list of detected devices
on the screen of the BLUETOOTH device. If “MDR-EX31BN” is
not displayed, repeat from step 1.
3. Select “MDR-EX31BN” on the screen on the BLUETOOTH
device to pair both devices.
If passkey input is required on the display of a BLUETOOTH
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device, input “0000.”
A Passkey may be called a “Passcode,” a “PIN code,” a “PIN
number,” or a “Password.”
4. Make the BLUETOOTH connection from the BLUETOOTH
device.
Depending on the BLUETOOTH device, the headset may be
connected with the device automatically as soon as they are
paired.
Tip
To delete all pairing information, see “What can I do to solve a
problem?”
Notes
For details, refer to the manual supplied with the BLUETOOTH
device.
When pairing with a BLUETOOTH device that cannot display a list
of detected devices or that has no display, you may pair the device
by setting both the headset and the BLUETOOTH device to
pairing mode. At this time, if passkey is set besides “0000” on the
BLUETOOTH device, pairing cannot be done with the headset.
Once BLUETOOTH devices are paired, there is no need for
pairing again, except in the following cases:
Pairing information is deleted after repair, etc.
The headset is paired with 9 or more devices. The headset can
be paired with up to 8 devices; if a new device is paired after 8
devices have been paired, the device whose latest connection
time is the oldest among the 8 paired devices is replaced by the
new one.
When recognition of the headset by the device to be connected
is deleted.
The headset is initialized. [Details] All pairing information is
deleted.
Connecting with a paired BLUETOOTH device
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Important
information
Contents list
Connecting with a paired
BLUETOOTH device
1. Turn on the headset.
Press and hold the
POWER button for about 2 seconds.
Make sure that the indicator (blue) flashes after you release the
button.
If the BLUETOOTH device was connected with the headset
the last time, an HFP/HSP connection is made when you turn
on both devices. To make an A2DP connection (music
playback), press the
POWER ( ) button again.
Check the connecting status on the BLUETOOTH device. If
not connected, proceed to step 2.
2. Make the BLUETOOTH connection from the BLUETOOTH
device.
For details, refer to the manual supplied with your BLUETOOTH
device.
Indications of BLUETOOTH function
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Indications of BLUETOOTH function
The indicator flashes in red or blue to indicate the BLUETOOTH
connection status.
Status
Flashing pattern
: blue/ : red
Pairing mode
Connectable
Connecting
Connected (HFP/HSP or
A2DP)
Connected (HFP/HSP and
A2DP)
Playing music or During a call
(Connected HFP/HSP or
A2DP)
Playing music or During a call
(Connected HFP/HSP and
A2DP)
Incoming call
When the remaining battery power becomes low, the indicator turns
from blue to red, except for pairing mode.
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Compatible smartphones
NFC (Near Field Communication) is a technology enabling short-
range wireless communication between various devices, such as
mobile phones and IC tags. Thanks to the NFC function, data
communication can be achieved easily just by touching the relevant
symbol or designated location on NFC compatible devices.
By using the NFC function, the headset is turned on automatically and
then paired and connected with a BLUETOOTH device.
Compatible smartphones
Smartphones with the NFC function built-in (OS: Android 2.3.3 or
later, excluding Android 3.x)
Preparation on the smartphone
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Preparation on the smartphone
1. Download and install the app “NFC Easy Connect” in your
smartphone.
Access the following Web site:
https://play.google.com/store/apps/details?
id=com.sony.easyconnect
The App may not be available in some countries and/or regions.
By the two-dimensional code:
Use a two-dimensional code reader app.
Tip
If your smartphone has an NFC function, such as that of Android
4.1 or later, you may not need to install “NFC Easy Connect” to
connect the headset with your smartphone by one touch. In that
case, you do not need to perform step 1, above. The operation
and specifications may be different from the description here. For
details, refer to the manual supplied with your smartphone.
2. Set the smartphone so that the NFC function can be used.
For details, refer to the manual of the smartphone.
About “NFC Easy Connect” App
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About “NFC Easy Connect” App
“NFC Easy Connect” is Sony’s original app for Android Phone
available at Google Play Store.
To find out more about the functions, search for “NFC Easy Connect”
and download the free app.
The App may not be available in some countries and/or regions.
Connecting with a smartphone by one-touch functions
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Switching the device by one-touch
functions
When the headset is connected with a BLUETOOTH device, if you
touch an NFC compatible smartphone on the headset, the headset
is connected with the smartphone that touched on the headset
most recently.
If you touch the smartphone that is connected with the headset on
another NFC compatible BLUETOOTH headset or BLUETOOTH
speaker, the smartphone is disconnected from the headset, and
connected with the BLUETOOTH device touched.
Note
Unlock the screen of the smartphone beforehand. If you installed
the “NFC Easy Connect” App in the smartphone, start the “NFC
Easy Connect” App.
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Contents list
Listening to music
You can enjoy listening to music and basic remote control operation
of a BLUETOOTH device via a BLUETOOTH connection. The
BLUETOOTH device is required to support the following
BLUETOOTH profiles.
A2DP (Advanced Audio Distribution Profile): enables you to enjoy
high-quality audio content wirelessly.
AVRCP (Audio Video Remote Control Profile): enables you to
enjoy basic remote control operation (play, stop, etc.) of a
BLUETOOTH device.
The headset supports SCMS-T content protection. You can enjoy
music, etc., from a device such as a mobile phone or portable TV that
supports SCMS-T content protection.
The operation may vary depending on the BLUETOOTH device.
Refer to the manual supplied with your BLUETOOTH device.
1. Connect the headset with a BLUETOOTH device.
2. Connect the headphones supplied.
3. Clip the headset to a pocket, etc., of your clothes and then wear
the headphones.
Wear the earphone marked
in your left ear, and the one
marked
in your right ear. The side has a tactile dot.
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Tip
You can attach a strap (sold separately) to the headset through
the strap hole.
4. Play back music or video on the BLUETOOTH device.
Tip
Depending on the BLUETOOTH device, it may be necessary to
adjust the volume or set the audio output setting on the connected
device.
After use
1. Terminate the BLUETOOTH connection by operating the
BLUETOOTH device.
2. Press and hold the
POWER button for about 2 seconds.
The indicator (blue) goes off and the headset turns off.
Tip
When you finish playing music, the BLUETOOTH connection may
terminate automatically, depending on the BLUETOOTH device.
Changing the earbuds
If the earbuds do not fit your ears correctly, the sound effect will not
be optimal. To enjoy better sound quality, change the earbuds to
another size, or adjust the earbud position to fit your ears comfortably
and snugly.
SS (Red)
(sold separately)
S (Orange)
(supplied)
M (Green)
(supplied)
L (Light blue)
(supplied)
To detach an earbud
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Selecting the sound quality mode of
music playback
The sound quality is set to the “Standard” mode (SBC high quality
mode) as the default setting.
When using an AAC or aptX compatible device, select the “Priority
on sound quality” mode.
If the connection is unstable, such as when producing only
intermittent sound, select the “Priority on stable connection” mode.
Sound quality and the indicator (blue) of each mode
When the sound quality mode is switched, the headset indicates the
remaining battery capacity by flashing the indicator in red first, and
then in blue to indicate the sound quality mode. You can check the
current sound quality mode by the number of flashes of the indicator
(blue).
Mode Sound quality
Number of
flashes (blue)
Priority on
sound quality
SBC (high quality), AAC or aptX
selected automatically
3 times
Standard SBC (high quality) Twice
Priority on
stable
connection
SBC Once
Note
When you turn on the headset by pressing the POWER button
only, the headset does not indicate the sound quality mode with
flashes of the indicator (blue).
Selecting the sound quality mode
Turn on the headset by pressing the
POWER button for more than
2 seconds while holding the VOL + or VOL – button down.
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To select the “Priority on sound quality” mode
When the headset is in the “Standard” mode, turn it on while holding
the VOL + button down. The “Priority on sound quality” mode is
selected.
From the “Priority on stable connection” mode, turn on the headset
while holding the VOL + button down. Turn off the headset once, then
turn it on while holding the VOL + button down again.
To select the “Priority on stable connection” mode
When the headset is in the “Standard” mode, turn it on while holding
the VOL – button down. The “Priority on stable connection” mode is
selected.
From the “Priority on sound quality” mode, turn on the headset while
holding the VOL – button down. Turn off the headset once, then turn it
on while holding the VOL – button down again.
Notes
The playback time may become shorter, depending on the sound
quality and the conditions under which you are using the headset.
Depending on the ambient conditions in the area where you are
using the headset, intermittent sound may still occur, even if the
“Priority on stable connection” mode is selected.
Using the noise canceling
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Using the noise canceling
Set the noise canceling switch of the headset to NC (default setting).
When the switch is set to NC, NC Mode B is set. [Details]
Notes
The noise canceling circuit actually senses outside noise with
built-in microphones and sends an equal-but-opposite canceling
signal to the headset.
The noise canceling effect may not be pronounced in a very quiet
environment, or some noise may be heard.
The noise canceling effect may vary depending on how you wear
the headset.
The noise canceling function works for noise in the low frequency
band primarily. Although noise is reduced, it is not canceled
completely.
When you use the headset in a train or a car, noise may occur
depending on street conditions.
Mobile phones may cause interference and noise. Should this
occur, locate the headset further away from the mobile phone.
Do not cover the microphones of the headphones with your
hands. The noise canceling function may not work properly.
Microphone of headphones
You can also use other headphones than the ones supplied with
this headset. When you use headphones not supplied with the
headset, the noise canceling function may not work as efficiently
as it is designed. If you use any headphones not supplied with this
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Using the AI noise canceling
AI Noise Canceling is a useful function that automatically selects one
of the noise canceling modes. This function provides the most
effective noise canceling mode by immediately analyzing ambient
sound components when the noise canceling switch is slid to the AI
NC side.
Slide the noise canceling switch to the AI NC side.
When the headset is on, keep the noise canceling switch to the AI NC
side until beep sounds come from the headphones. The headset
starts analyzing ambient sound components (about. 3 seconds).
During analysis, sound volume from the headphones is lowered and
the indicator blinks.
When analysis is completed, the most effective noise canceling mode
is set automatically, and sound volume from the headphones returns
to the normal.
Noise canceling mode types
NC
Mode
A
Reduces noise containing a large amount of middle to low
frequency sounds. Ambient noise in the environment is
effectively reduced.
NC
Mode
B
Reduces noise containing a large amount of super low
frequency sounds. For example, background noise heard
mainly on a bus or a train is effectively reduced.
NC
Mode
C
Reduces noise of relatively quiet and wide range of
frequency sounds. Background noise mainly present in an
office environment (PCs, copiers, etc.) is effectively reduced.
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Controlling the audio device
If the BLUETOOTH device supports AVRCP, you can control it by the
buttons on the headset. The functions available may vary depending
on the BLUETOOTH device. Refer to the manual supplied with your
BLUETOOTH device.
To play/pause
Press the
POWER ( ) button.
To adjust the volume
Press the VOL +/– button.
To skip to the next/previous song
Press the
/ button.
To fast-forward/fast-reverse
Press and hold the / button.
Note
If the communication condition is poor, the BLUETOOTH device
may react incorrectly to the operation on the headset.
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Making a call
You can enjoy a hands-free call with a BLUETOOTH smartphone or
mobile phone that supports the BLUETOOTH profile HFP (Hands-free
Profile) or HSP (Headset Profile), via a BLUETOOTH connection.
If your BLUETOOTH smartphone or mobile phone supports both HFP
and HSP, set it to HFP.
1. Connect the headset with a BLUETOOTH smartphone or mobile
phone.
2. Use the buttons on your smartphone or mobile phone when
making a call.
If no dial tone is heard via the headset, switch the call device to
the headset using your smartphone or mobile phone. With an
HFP connection, you can do this by pressing the
POWER
button on the headset for about 2 seconds.
Refer to the manual supplied with your smartphone or mobile
phone for the details of the operation.
To adjust the volume
Press the VOL +/– button.
Tips
You cannot adjust the volume when not talking.
Volume for a call and listening to music can be adjusted
independently. Even if you change the volume while playing back
the music, the volume of a call does not change.
To end a call
Press the
POWER button on the headset.
After use
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1. Disconnect the BLUETOOTH connection using the smartphone
or mobile phone.
2. Press and hold the
POWER button on the headset for about 2
seconds.
The indicator (blue) goes off, and the headset turns off.
Related topic
Pairing and connecting with an Android smartphone
Pairing and connecting with an iPhone
Pairing and connecting with other BLUETOOTH devices
Receiving a call
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Receiving a call
1. Connect the headset with a BLUETOOTH device in advance.
2. When there was a call, press the
POWER button on the
headset and receive the call.
Receive a call in the same way when a call arrives while you are
listening to music.
The music stops while you are talking, and resumes automatically
when you end the call.
The ring tone differs in the following ways, depending on your
smartphone or mobile phone.
ring tone set on the headset
ring tone set on the smartphone or mobile phone
ring tone set on the smartphone or mobile phone only for a
BLUETOOTH connection
Notes
If you received a call using your smartphone or mobile phone,
some smartphones or mobile phones may have handset use
priority. In the case of the HFP connection, talk on the headset by
pressing the
POWER button on the headset for about 2
seconds, or using your smartphone or mobile phone. For details,
refer to the manual supplied with your smartphone or mobile
phone.
Depending on some BLUETOOTH devices, music playback may
not resume automatically after you end a call while playing back
music.
To adjust the volume
Press the VOL +/– button.
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Tips
You cannot adjust the volume when not talking.
Volume for a call and listening to music can be adjusted
independently. Even if you change the volume while playing back
the music, the volume of a call does not change.
To end a call
Press the
POWER button on the headset.
After use
1. Disconnect the BLUETOOTH connection using the smartphone
or mobile phone.
2. Press and hold the
POWER button on the headset for about 2
seconds.
The indicator (blue) goes off, and the headset turns off.
Controlling the smartphone or mobile phone
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Controlling the smartphone or mobile
phone
The function available may vary depending on the profile supported
by your BLUETOOTH smartphone or mobile phone. Even if the phone
has the same profile, functions may vary depending on the
specifications. Refer to the manual supplied with your smartphone or
mobile phone.
Supported profile: HFP
Status
POWER button
Outgoing
call
Press once to cancel outgoing call.
Press for about 2 seconds to change call device
between the headset and the smartphone or mobile
phone.
Incoming
call
Press once to answer call.
Press for about 2 seconds to reject call.
During
call
Press once to finish call.
Press for about 2 seconds to change call device
between the headset and the smartphone or mobile
phone.
Supported profile: HSP
Status
POWER button
Outgoing call
Press once to cancel outgoing call.*
Incoming call
Press once to answer call.
During call
Press once to finish call.*
* Some devices may not support this function.
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Connecting the headset with a music
player and a smartphone (mobile
phone)
To call using a BLUETOOTH smartphone or mobile phone while
listening to music played on another BLUETOOTH compatible music
player, the headset needs to be connected with each device with a
BLUETOOTH connection.
1. Pair the headset with a BLUETOOTH music player and a
smartphone (mobile phone), respectively.
2. Make an A2DP BLUETOOTH connection between the headset
and the BLUETOOTH music player.
3. Make an HFP or HSP BLUETOOTH connection between the
headset and the BLUETOOTH smartphone or mobile phone.
Note
If you have previously connected this BLUETOOTH device, an
HFP or HSP connection is made automatically when you turn on
the headset. At the same time, an A2DP connection may also be
made automatically. If this happens, disconnect the headset from
the smartphone or mobile phone once using the phone, then
connect the devices again by repeating the process from step 2.
To call during playback
Make a phone call by operating the smartphone or mobile phone.
If no dial tone is heard via the headset, switch the call device to
the headset using your smartphone or mobile phone. With an
HFP connection, you can do this by pressing the
POWER
button on the headset for about 2 seconds.
To receive a call
When an incoming call arrives, the music playback pauses, and a ring
tone is heard via the headset.
Press the
POWER button on the headset and talk using the
microphone.
To end a call, press the
POWER button on the headset to
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switch back to music playback.
Note
When no ring tone is heard even if an incoming call arrives, stop
music playback. When ringing, press the
POWER button and
talk.
To disconnect the call
Press the
POWER button on the headset to switch back to music
playback.
Related topic
Pairing and connecting with an Android smartphone
Pairing and connecting with an iPhone
Pairing and connecting with other BLUETOOTH devices
Connecting with a smartphone by one-touch functions
Connecting the headset with 2 Android smartphones
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Connecting the headset with 2
Android smartphones
When you connect the headset with a smartphone, usually the music
playback function and the phone call function are both connected
automatically. To make a multi point connection with 2 smartphones
separately, one for listening to music and the other for making phone
calls, change the settings of the smartphones so that only one of the
functions is connected for each smartphone.
1. Pair the headset with both smartphones, respectively.
2. Use one of the smartphones to establish a BLUETOOTH
connection with the headset.
3. On the smartphone connected to the headset, uncheck either
[Phone audio] (HFP) or [Media audio] (A2DP).
Example: To connect “Media audio” (A2DP) only
Touch [Settings]
[Bluetooth] the setting icon next to [MDR-
EX31BN].
On the [Paired Bluetooth device] screen, uncheck [Phone audio].
4. Terminate the BLUETOOTH connection of the smartphone.
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5. Use the other smartphone to establish a BLUETOOTH
connection with the headset.
6. In the same way, uncheck the function that you did not uncheck
in step 3.
7. Use the first smartphone to establish a BLUETOOTH connection
again.
Both smartphones are connected with the headset with only one
function enabled.
To call during playback
Make a phone call using the smartphone designated for making a
phone call.
If no dial tone is heard via the headset, switch the call device to
the headset using your smartphone or mobile phone. With an
HFP connection, you can do this by pressing the
POWER
button on the headset for about 2 seconds.
To receive a call
When an incoming call arrives, the music playback pauses, and a ring
tone is heard via the headset.
Press the
POWER button on the headset and talk using the
microphone.
To end a call, press the
POWER button on the headset to
switch back to music playback.
Note
When no ring tone is heard even if an incoming call arrives, stop
music playback. When ringing, press the
POWER button and
talk.
To disconnect the call
Press the
POWER button on the headset to switch back to music
playback.
Related topic
Pairing and connecting with an Android smartphone
Connecting with a smartphone by one-touch functions
Connecting the headset with an Android smartphone and an
iPhone
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Connecting the headset with an
Android smartphone and an iPhone
When you connect the headset with a smartphone, usually the music
playback function and the phone call function are both connected
automatically. To make a multi point connection using an Android
smartphone and an iPhone separately for listening to music and
making phone calls, change the settings on the Android smartphone
so that only one of the functions is connected. Connect the Android
smartphone first, and then connect the iPhone.
You cannot set the iPhone to connect one function only.
1. Pair the headset with both smartphones, respectively.
2. Use the Android smartphone to establish a BLUETOOTH
connection with the headset.
3. On the smartphone connected to the headset, uncheck either
[Phone audio] (HFP) or [Media audio] (A2DP).
Example: To connect “Media audio” (A2DP) only
Touch [Settings]
[Bluetooth] the setting icon next to [MDR-
EX31BN].
On the [Paired Bluetooth device] screen, uncheck [Phone audio].
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4. Use the iPhone to establish a BLUETOOTH connection with the
headset.
The iPhone is connected with the headset with both functions,
but you can only use the function that you did not uncheck in step
3.
To call during playback
Make a phone call using the smartphone designated for making a
phone call.
If no dial tone is heard via the headset, switch the call device to
the headset using your smartphone or mobile phone. With an
HFP connection, you can do this by pressing the
POWER
button on the headset for about 2 seconds.
To receive a call
When an incoming call arrives, the music playback pauses, and a ring
tone is heard via the headset.
Press the
POWER button on the headset and talk using the
microphone.
To end a call, press the
POWER button on the headset to
switch back to music playback.
Note
When no ring tone is heard even if an incoming call arrives, stop
music playback. When ringing, press the
POWER button and
talk.
To disconnect the call
Press the
POWER button on the headset to switch back to music
playback.
Related topic
Pairing and connecting with an Android smartphone
Pairing and connecting with an iPhone
Connecting with a smartphone by one-touch functions
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Important
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Contents list
What can I do to solve a problem?
If the headset does not function as expected, try the following steps to
resolve the issue.
1. Find the symptoms of the issue in this manual, and try any
corrective actions listed. [Details]
2. Connect the headset to your computer to charge the battery.
[Details]
You may be able to resolve some issues by charging the battery.
3. Press the RESET button of the headset.
4. Initialize the headset.
This operation resets volume setting, etc. and deletes all pairing
information.
5. Look up information on the issue on the customer support Web
site.
http://www.sony.net/
6. If the approaches listed above fail to resolve the issue, consult
your nearest Sony dealer.
Initializing the headset
1. Press and hold the
POWER button for about 2 seconds to
turn off the headset.
2. Press and hold the
POWER button for about 15 seconds.
The indicator (blue) flashes 4 times, and the headset is reset to
the default setting. All pairing information is deleted.
Table of contents for symptoms and possible causes
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Important
information
Contents list
Table of contents for symptoms and
possible causes
The following topics show possible causes and remedies for
symptoms. See an appropriate topic according to your problem.
Power and charging
BLUETOOTH connection
One-touch connection (NFC)
Music
Phone calls
Power and charging
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Power and charging
The headset is not turned on.
Charge the battery of the headset.
The headset cannot be turned on while charging the battery.
Remove the micro-USB cable from the headset, and then turn on
the headset again.
Charging cannot be done.
Check that you are using the micro-USB cable supplied.
Check that the micro-USB cable is connected to the headset and
the computer firmly.
Check that the computer is turned on.
Check that the computer is not in standby, sleep or hibernation
mode.
Charging time is too long.
Check that the headset and the computer are directly connected,
not via a USB hub.
The headset cannot be recognized by a computer.
The micro-USB cable is not connected properly to the USB port
of the computer. Connect the micro-USB cable again.
Check that the headset and the computer are directly connected,
not via a USB hub.
A problem may have occurred with the connected USB port of
the computer. Connect to another USB port if it is available.
Try the USB connection procedure again in cases other than
those stated above.
BLUETOOTH connection
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BLUETOOTH connection
Pairing cannot be done.
Bring the headset and the BLUETOOTH device closer together.
Cannot make a BLUETOOTH connection.
Check that the headset is turned on.
Check that the BLUETOOTH device is turned on and the
BLUETOOTH function is on.
Connection with the BLUETOOTH device may not be memorized
on the headset. Make a BLUETOOTH connection from the
BLUETOOTH device to the headset soon after pairing is
complete.
The headset or the BLUETOOTH device is in sleep mode.
The BLUETOOTH connection is terminated. Make the
BLUETOOTH connection again.
Distorted sound
Make sure that the headset is not receiving interference from a
wireless LAN, other 2.4 GHz wireless device, or microwave oven.
The correspondence distance is short. (Sound skips.)
If a device that generates electromagnetic radiation, such as a
wireless LAN, other BLUETOOTH device(s), or a microwave
oven is nearby, move the headset away from such sources.
Point the antenna of the headset towards the BLUETOOTH
device. Make sure no obstacles blocks the communication.
The headset does not operate properly.
Reset the headset. Pairing information is not deleted by this
operation.
Insert a small pin, etc., into the hole, and push it until you feel a
click.
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If you cannot use the headset even after resetting it, initialize the
headset.
Press and hold the POWER button for about 2 seconds to
turn off the headset.
Press and hold the POWER button for about 15 seconds.
The indicator (blue) flashes 4 times, and the headset is reset to
the default setting. All pairing information is deleted.
One-touch connection (NFC)
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Help Guide
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Getting Started
BLUETOOTH
One-touch
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Music
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One-touch connection (NFC)
Cannot make the one-touch connection.
If the smartphone is in a case, the headset may not react to the
touching. Remove the smartphone from the case.
If the smartphone does not vibrate, start the app on the
smartphone, and move the designated location of the
smartphone close to the N mark on the headset.
Depending on the smartphone or mobile phone you are using,
the NFC sensitivity may not be strong enough to connect the
headset with just one touch. In this case, follow the procedure
described in “Pairing and connecting with an Android
smartphone.”
You cannot make a one-touch connection while charging the
battery because the headset cannot be turned on. Finish
charging first, and then make the one-touch connection.
Music
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Contents list
Music
No sound
Check that both the headset and the BLUETOOTH device are
turned on.
An A2DP BLUETOOTH connection is not made between the
headset and the BLUETOOTH device. Use the BLUETOOTH
device and make an A2DP BLUETOOTH connection.
Check that music is being played back by the BLUETOOTH
device.
Check that the volume of the headset is not set too low.
Turn up the volume on the connected device if necessary.
Pair the headset and the BLUETOOTH device again.
Low sound level
Turn up the volume of the headset.
Turn up the volume on the connected device if necessary.
Low sound quality
Use the BLUETOOTH device and switch the BLUETOOTH
connection to A2DP (Advanced Audio Distribution Profile) when
HFP (Hands-free Profile) or HSP (Headset Profile) is set.
If you have previously connected this BLUETOOTH device, only
an HFP/HSP BLUETOOTH connection may be made when the
headset is turned on. If this happens, use the BLUETOOTH
device and make an A2DP BLUETOOTH connection.
Sound skips frequently during playback.
Set the headset to the “Priority on stable connection” mode.
For details, refer to “Selecting the sound quality mode of music
playback.”
The noise canceling effect is not sufficient.
Make sure that the noise canceling switch is set to NC.
Change the earbuds to another size that fit your ears. Adjust the
earbud position to fit your ears comfortably. When you change
the earbuds, install them firmly on the headphones to prevent the
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Help Guide
MDR-EX31BN Top > Troubleshooting > Possible causes of symptoms >
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One-touch
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Music
Phone calls
Multi point
connection
Troubleshooting
Important
information
Contents list
Phone calls
The caller’s voice cannot be heard.
Check that both the headset and the BLUETOOTH smartphone
or mobile phone are turned on.
Check the connection between the headset and the
BLUETOOTH smartphone or mobile phone. Use the smartphone
or mobile phone and make a BLUETOOTH connection (HFP or
HSP) again.
Check that output of the BLUETOOTH smartphone or mobile
phone is set for the headset.
Check that the volume of the headset is not set too low.
Turn up the volume on the BLUETOOTH smartphone or mobile
phone if necessary.
If you are listening to music using the headset, stop playback,
press the
POWER button and talk.
Low sound from the caller
Turn up the volume of the headset.
Turn up the volume on the BLUETOOTH smartphone or mobile
phone if necessary.
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Getting Started
BLUETOOTH
One-touch
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Music
Phone calls
Multi point
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Troubleshooting
Important
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Contents list
License and trademark notice
The BLUETOOTH word mark and logos are owned by the
Bluetooth SIG, Inc. and any use of such marks by Sony
Corporation is under license.
The N Mark is a trademark or registered trademark of NFC Forum,
Inc. in the United States and in other countries.
Android is a trademark of Google Inc.
iPhone is a trademark of Apple Inc., registered in the U.S. and
other countries.
Microsoft, Windows and Windows Vista are registered trademarks
or trademarks of Microsoft Corporation in the United States and/or
other countries.
Macintosh and Mac OS are trademarks of Apple Inc., registered in
the U.S. and other countries.
The aptX® mark and the aptX logo are trade marks of CSR plc or
one of its group companies and may be registered in one or more
jurisdictions.
Other trademarks and trade names are those of their respective
owners.
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