Yamaha SR-B40A, Руководство пользователя

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Enabling/disabling the Child Lock function
Locking the controls of the sound bar prevents accidental operation (Child Lock function).
Default setting: Disabled (no Child Lock)
1
Turn off the sound bar.
2
Hold down
O
for at least five seconds.
The Child Lock function switches from enabled to disabled, or from disabled to enabled.
The indicator shows the setting status for a few seconds as follows, and the sound bar turns
on.
Glows: when enabled (Child Lock)
Off: when disabled (no Child Lock)
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CHANGING AND INITIALIZING THE SETTINGS > Enabling/disabling the Child Lock function