No Sound When I Connect the Headphone Amplifier to a Walkman Player or Mobile Device

IMPORTANT: This article applies only to specific products and/or operating systems. Check Applicable Products and Categories for details.

Follow these steps to resolve this issue:

1. Make sure that the battery for the headphone amplifier is fully charged.
2. Power off your device and then power it back on.

   1. Rotate the Power/volume knob to the left until it clicks to turn off your device.
   2. Rotate the Power/volume knob to the right to turn on your device.
      • The POWER or POWER/CHG indicator flashes, then lights up in green when your device is powered on.

3. Check the settings and connection between your device and the Walkman® player or mobile device.

   If you're connecting a Walkman player

   For PHA-1

   1. Power on your Walkman player.
   2. Connect one end of the audio cable for Walkman (supplied with your headphone amplifier) to the AUDIO IN port of your device.

      

      

   3. Connect the other end of the cable to your Walkman player.
   4. Set the input select switch to AUDIO IN.

   For PHA-1A

   1. Power on your Walkman player.
   2. Connect one end of the digital cable for Walkman (supplied with your headphone amplifier) to the INPUT port of your device.

      

      

   3. Connect the other end of the cable to your Walkman player.

   For PHA-2

   1. Power on your Walkman player.
   2. Set the input select switch to the position of the Walkman connecting port (second position from left.)

      

   3. Connect one end of the digital output USB cable for Walkman (supplied with your headphone amplifier) to the Walkman connecting port.

      

      

   4. Connect the other end of the cable to your Walkman player.

   For PHA-3

   1. Power on your Walkman player.
   2. Set the INPUT select switch to the position of the Xperia/WALKMAN/PC connecting port (left edge position).

      

   3. Connect one end of the digital cable for Walkman supplied with your headphone amplifier to the Xperia/WALKMAN/PC connecting port.

      

      

   4. Connect the other end of the cable to your Walkman player.

   If you're connecting a mobile device or other devices

   Stereo mini cable connection (PHA-1 and PHA-2 only)

   1. Make sure to connect your device to the mobile device with the stereo mini cable (supplied with the headphone amplifier).

      

   2. Make sure the input select switch is set to AUDIO IN.

   Connecting an Xperia™ mobile device (PHA-1A and PHA-3 only)

   1. Make sure to use the digital cable for Xperia (supplied with the headphone amplifier) and not the cable that comes with your mobile device.

      

   2. For PHA-3, make sure to set the INPUT select switch to the position of the Xperia/WALKMAN/PC connecting port (left edge position).

      

   3. If you want to connect an Xperia Z4 or Xperia Z5 with PHA-1A, perform the following on your mobile device:
      1. On the Home screen, tap Settings.
      2. Tap Device Connection.
      3. Tap USB Connectivity.
      4. Tap Detect USB device.

   Connecting an Apple® iOS® device

   1. Make sure to connect your device and iOS device with the USB cable supplied with your iOS device.
   2. Set the input select switch to the position of iPhone/iPad/iPod connecting port.

      

4. Make sure that your headphones are connected to the headphone port and not to the AUDIO IN/LINE OUT ports.
5. Check if you can hear sound from the headphones when you playback the connected device.