No sound from one side of the earphones

one_side_sound_none

If no sound is heard from one side of the earphones, initializing the earphones may solve the problem.
Follow the steps below to check whether there is any abnormality with the sound output.

Checking the Serial Number before Initialization

There are two initialization procedures. Refer to the procedure below.

Check the serial number on the bottom of the charging case and that it is underlined.

Serial_A20T + Serial_A20T

Bottom of the charging case

Serial number

Underline

If the serial number is not underlined, follow the Procedure A to initialize.

If the serial number is underlined, follow the Procedure B to initialize.

If you can’t tell if the serial number is underlined or not, initialize by following the Procedure A. Continue with the Procedure B if initialization fails.

Initializing (Procedure A)

First of all, go to the Bluetooth settings of the device to be connected and delete the information of this unit that is registered on it.

Remove the earphones once if they are inserted into the charging case.

Follow the steps below to initialize the settings of both L and R earphones.

  1. Charge the charging case

    2. charging_2_No-PC_charge_A20T + Charge_2_A20T

    5V TYPE

    Connect the USB charging cable to the charging case and follow the steps below while charging is in progress.

Initialize the L earphone.

  1. Insert the L earphone into the charging case

    2. charging_1_L_A20T

    After a few seconds, the indicator on the L earphone and charging case will light up.

    Charging_2_L_New_A20T + Charging_2_L_New_A20T

    Indicator

    Indicators

    Click here if the indicators do not light up or start flashing ＞＞

  2. Touch and hold the touch sensor area on the L side of the earphones for about 15 seconds to initialize

    3. Initializing_L_A20T + Initializing_L_A20T

    Touch sensor area

    While your finger is in contact with the touch sensor, avoid blocking the indicator with your finger.

    Release your finger after the indicator on the L side blinks twice.

    If the earphone wobbles and the indicator turns off while touching for 15 seconds, start over from step 2.

    If the indicator does not flash, start over from step 2.

  3. Remove the L earphone from the charging case

    4. take_out_L_A20T

Initialize the R earphone.

  1. Insert the R earphone into the charging case

    2. charging_1_R_A20T

    After a few seconds, the indicators on the R earphone and charging case will turn on.

    Charging_2_R_New_A20T + Charging_2_R_New_A20T

    Indicator

    Indicators

    Click here if the indicators do not light up or start flashing ＞＞

  2. Touch and hold the touch sensor area on the R side of the earphones for about 15 seconds to initialize

    3. Initializing_R_A20T + Initializing_R_A20T

    Touch sensor area

    While your finger is in contact with the touch sensor, avoid blocking the indicator with your finger.

    Release your finger after the indicator on the R side blinks twice.

    If the earphone wobbles and the indicator turns off while touching for 15 seconds, go back to step 5, and start over from step 6.

    If the indicator does not flash, start over from step 5.

  3. Insert the L earphone into the charging case

    4. charging_1_2_L_A20T

  4. Remove both earphones at the same time

    5. take_out_A20T

    The indicator on both earphones lights up and the power turns on.

    Wait for a short while for both indicators to flash quickly. The earphones are now ready for device pairing.

    After taking out the earphones, move the L and R earphones close to the device to pair with.

BT_Earphone_CAUTION_Blank_Line

Initialization is now complete.

If initialization fails, both L and R indicators won't flash quickly. In such case, start the initialization procedure again from the beginning.

Initializing (Procedure B)

First of all, go to the Bluetooth settings of the device to be connected and delete the information of this unit that is registered on it.

Charge the charging case beforehand.

Remove the earphones once if they are inserted into the charging case.

Follow the steps below to initialize the settings of both L and R earphones.

Initialize the L earphone.

  1. Insert the L earphone into the charging case

    2. charging_1_L_A20T

    After a few seconds, the indicator on the L earphone and charging case will light up.

    Charging_2_L_New_A20T + Charging_2_L_New_A20T

    Indicator

    Indicators

    Click here if the indicators do not light up or start flashing ＞＞

  2. Touch and hold the touch sensor area on the L side of the earphones for about 10 seconds

    3. Initializing_L_A20T + Initializing_L_A20T

    Touch sensor area

    Release your finger after the L indicator flashes quickly.

    If the indicator does not flash, start over from step 1.

  3. While flashing, tap the touch sensor area twice quickly to initialize

    4. Initializing_L_A20T + Initializing_L_A20T

    Touch sensor area

    The indicator will stop flashing after 5 seconds. Tap it twice quickly while it is still flashing.

    After initialization is complete, the L indicator will flash twice slowly.

    If initialization is not successful, start over from step 1.

  4. Remove the L earphone from the charging case

    5. take_out_L_A20T

Initialize the R earphone.

  1. Insert the R earphone into the charging case

    2. charging_1_R_A20T

    After few seconds, the indicator on the charging case lights up.

    Charging_2_R_New_A20T + Charging_2_R_New_A20T

    Indicator

    Indicators

    Click here if the indicators do not light up or start flashing ＞＞

  2. Touch and hold the touch sensor area on the R side of the earphones for about 10 seconds

    3. Initializing_R_A20T + Initializing_R_A20T

    Touch sensor area

    Release your finger after the R indicator flashes quickly.

    If the indicator does not flash, start over from step 5.

  3. While flashing, tap the touch sensor area twice quickly to initialize

    4. Initializing_R_A20T + Initializing_R_A20T

    Touch sensor area

    The indicator will stop flashing after 5 seconds. Tap it twice quickly while it is still flashing.

    After initialization is complete, the R indicator will flash twice slowly.

    If initialization is not successful, start over from step 5.

  4. Insert the L earphone into the charging case

    5. charging_1_2_L_A20T

Connect the L earphone with the R earphone.

  1. Remove both earphones at the same time

    2. Be careful not to touch the touch sensor area when taking them out.

    connecting_LR_1_A20T

    The indicator on both earphones lights up and the power turns on.

    Wait for a short while for both indicators to flash quickly. The earphones are now ready for device pairing.

    connecting_LR_2_A20T

    After taking out the earphones, move the L and R earphones close to the device to pair with.

BT_Earphone_CAUTION_Blank_Line

Initialization is now complete.

If initialization fails, both L and R indicators won't flash quickly. In such case, start the initialization procedure again from the beginning.

Connecting to a Device

    Turn on the BLUETOOTH connection setting of the device and select “JVC HA-A7T2”
    connecting_smp_1
    connecting_smp_2
    connecting_smp_3 + Device List JVC Nav

    JVC HA-A7T2

    blue_flash_A20T

    The earphones are connected to the device if the indicators on both sides of the earphones are flashing every 5 seconds.

Apps and Volume Control on the Connected Device

  1. Open an app and play

    2. app_01
    app_02

  2. Adjust the volume

    3. volume_smp_1

Select the state after checking

Thank you for using Troubleshooting Guide.

There seems to be a problem with the product.
If you require more assistance, please contact your local JVC customer support.

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