Patent ID: 8450873

Claim:
An AV system in which a power feeding apparatus and a plurality of power receiving apparatuses are connected in a daisy chain with the power feeding apparatus in the lead, wherein the power feeding apparatus includes: a connection detecting line; an applying unit that applies a voltage to the connection detecting line; and a power supply unit that supplies a power to the power receiving apparatus or suspends the supply of the power according to a voltage level of the connection detecting line, the power receiving apparatuses include: a contents signal output unit that outputs a contents signal that carries content data of the AV system upon the supply of the power; a ground terminal having a ground potential; a conducting line that connects to another power receiving apparatus in the daisy chain; and a first switch unit that switches the connection detecting line between the ground terminal of the power receiving apparatus and the conducting line that connects to the ground terminal in the another power receiving apparatus through the first switch unit in the another power receiving apparatus to change the voltage level of the connection detecting line, and that holds a connected state even when the power is not supplied.