Do you know if your Sony Bravia TV has Audio OUtput (RCA) jacks in the back?
I don't know about your particular Sony model, but on the Wega that I used to own, but traded in there was a setting in the menu for
[1] Speakers On - RCA outout off [2] Speakers Off - Fixed Audio Output RCA jacks [3] Speakers Off - Variable Audio Output to the RCA jacksIf you have a similar setup on your Sony, you can use the Variable Audio Output to use the TV remote to control the volume going to the amplifier.
You would hook up the output from the TV to the AUX on the back on the amplifer, never use the Phono input for anything other than a turntable.