Sony SRS-X77 Help Manual page 268

Help Guide
Troubleshooting
Personal Audio System
SRS-X77
The speaker has entered standby mode or BLUETOOTH/Network standby mode unexpectedly.
The speaker enters standby mode or BLUETOOTH/Network standby mode automatically if no operation is performed
and no sound is input for about 15 minutes. For details, see "Auto standby function."
4-569-737-11(1)
Copyright 2015 Sony Corporation
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