Astell & Kern AK Jr Operating instructions

Troubleshooting
The device won't turn on.
1. The battery may need to be recharged. Charge the device for at least one hour and try again.
2. Reset the device by pressing the on/off button for 12 seconds to force a shutdown. The device
can be restarted after the shutdown has been completed.
The device will not charge when connected to a computer via USB cable.
1. Use a USB port on the computer and check that the USB port is functioning properly.
2. Check that the USB cable is functioning properly.
The computer won't recognize the device or an error occurs when connected.
1. Check that the USB cable is connected correctly.
2. For Windows XP, verify that Service Pack 2 (or higher) and Windows Media Player 10 (or
higher) are installed.
3. Check if the device connects properly on a different computer.
The screen turns off repeatedly.
The screen turns off automatically after a defined period to reduce battery consumption. Access Power
in Settings on the device to adjust timeout settings.
The screen does not display images properly.

1. Check the device for debris.
2. Restart the device.
3. If issue still persists, contact customer service for further guidance.
There is no sound or there is static/interference.
1. Check that the volume setting is above 0.
2. Check that the earphones are plugged in properly and no debris is obstructing the port
connection.
3. Check if the music file is corrupted.
4. Verify that the audio settings have been properly set. (Balanced out, line out, etc.)
A file does not play or the product is unstable when a certain file is used.
1. The following may occur due to the condition of the file:
Playback is unstable or difficult.
The product may not work normally.
The file may sound different from a computer.
There may be a difference in the performance of playback or other functions.
There may be differences in the playback specs.
2. A file conversion or use of a different file is recommended.