[. . . ] [. . . ] Input Indicators @ Speaker/Channel Input Indicators The following controls and jacks are located behind the front-panel door. To open the door, place the edge of your finger on the left or right edge of the panel and gently swing the door down towards you. A Main Power Switch B Headphone Jack C Tone Mode Button D Speaker Selector Button E Channel Adjust Selector F Digital Input Selector G Delay Adjust Selector H </> Buttons I Set Button J Optical 3 Digital Input K Coaxial 3 Digital Jack L Video 4 Audio/Video Jacks [. . . ] [. . . ]