Patent ID: 7305568

Claim:
A backup system, for use in a multi-source audio apparatus capable of selectively reproducing sound from audio signals received from a plurality of sound sources including an analog tuner according to a user's instruction, for holding operation status information of the multi-source audio apparatus when operating power is shut off, the backup system comprising: control means for controlling operation of the multi-source audio apparatus; operation status holding means for holding the operation status information of the multi-source audio apparatus; non-volatile memory means for storing the operation status information; power storage means for storing part of the operating power; operating power detection means for detecting whether or not the operating power is being supplied; and operation status information write means for selectively writing the operation status information into the non-volatile memory means depending on whether or not the operating power is being supplied, wherein the operation status information includes first data to be written into the non-volatile memory means when the operating power is being supplied to the multi-source audio apparatus and second data to be written into the non-volatile memory means when the operating power to the multi-source audio apparatus is shut off.