Diagram? I dunno if there is such thing.
Think of your Receiver as the central command, the SWITCHER, all your PLAYERS, audio/video SOURCES hook up to this Receiver, then the Receiver, very standard has one video output going to TV, and one audio output going to each speakers.
On the input side of this Receiver, Digital(output)-to-digital(input), and Analog(out)-to-analog(in).