Sony HT-CT790 Manuel D'instructions page 8

Subwoofer
8
GB
 Power indicator
– Lights in red: The subwoofer is in
standby mode
– Flashes in green: While
attempting link connection
– Lights in green: The subwoofer is
connected to the system with the
link function
  (power) button
Turns on the subwoofer or sets it
to standby mode.
 LINK button (page 40)
 Ventilation holes
For safety, do not block the
ventilation holes.