operationeg, how did you get in touch with an engineer. I called Sharp several times and it seems like a different brain-dead zombie answered the call each time. Those imbeciles knew NOTHING and were no help at all. Talk about frustrating!!!! It's like they made a couple of that particular model of TV, burned the schematics, and vaporized any engineer who was involved with the project!
Thanks for all the input and suggestions, but if anyone has tried anything that actually worked, please post the details of your set-up. My desired set-up is quite simple: I have a Sony soundbar with wireless subwoofer (model number HT-CT260 ); it only has two inputs: an optical and a coaxial. Apparently, connecting the soundbar directly to the TV is not the best option. I also have a Sony receiver, so I'll try toying with that option. But I was hoping for the simplest set-up possible: just the TV and soundbar/subwoofer. My receiver does not have a coaxial outbput, so using the coaxial input on the soundbar does not appear to be an option. I may just have to get a different set of speakers.