Yamaha CS-700 Operation Manual page 24

the system will go into power savings mode. This feature is set by factory
default with a 20 minute power savings time.
The CS-700 will wake up when activity is detected, either on the Aux in, the
USB connection, or a button is pressed. Please allow about 10 seconds for the
system to wake up.
When the SIP interface is configured on the CS-700SP or CS-700DS version,
due to the requirements of the network and SIP interface, the unit will not go
into sleep mode.
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