Sony WALKMAN NWZ-A15 Help Manual page 335

Help Guide
Troubleshooting
Digital Media Player
NWZ-A15/A17
An alarm (beep) is heard and the message [Check the volume level] is displayed.
An alarm (beep) and a warning [Check the volume level] are meant to protect your ears when you turn the volume up
to a level that is harmful for your ears for the first time. You can cancel the alarm and warning by pressing any button.
You can turn up the volume after canceling the alarm and warning.
After the initial warning, the alarm and warning repeat every 20 cumulative hours that the volume is set to a level that
is harmful for your ears. When this happens, the volume is turned down automatically.
Related Topic
Volume operation (Only for countries/areas complying with European Directives)
4-540-313-13(1)
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