It can be done. Currently you would Only hear a DVD sound when played through the TV but broadcast TV would only come from the TVs built in speakers.
One possible work around would be using an Apple TV (feeding into the Furion aux input ) that you put on a wifi network from an iPad. iPads work much better than iPhones for picture quality as they have a better video chip. Then you would get Netflix, Hulu , HBO, some free CBS and ABC NEWS ETC.
BUT ASSUMING YOU JUST WANT TO HEAR BROADCAST TV...
1. First come out of the optical digital out port on your TV using a optical cable. I suggest a wire world 6 cable or better.
2. Run the other end of the optical cable into a DAC you can buy a small one from CEntrance (the Mini -M8) and there are many other manufacturers. Run the output from the DAC into your Furion Aux input. Set your Furion to Aux when you play the TV to hear the sound from the TV.
THIS IS OF COURSE...asssuming your the TV has a optical out but 95% of them do.
I hope that helps. When I get my Oliver I'm putting in an amazingly clear audiophile grade HIFi and I'm going to replace the TV with something much better.
I am going to use McIntosh Car amplifiers that have great parametric EQ modules so I can tailor the sound to overcome much of the acoustic short comings of the being in a fiberglass bread loaf shape. I will either use Boelender Greabner Neo 10 planar magnetic flat midranges or Scan Speak 12 Midranges, a special flat woofer from SB Acoustics, and super high quality tweeters. Head unit will be the Nakamichi TP -1200 tuner preamplifier. Sadly the speakers face down instead out out towards the listeners ears on the Olivers...not sure why this was done as it is not at all ideal for sound intelligibility which is particularly important to people as they age.