tv as a pre-amp?

Here's my situation. I had been using a 2 channel Adcom preamp to drive 2 channel Adcom amplifier in my living room for the purpose of watching TV. Well, it seems that the preamp has seen better days. I really don't want to repair it. The television I'm using has audio output jacks, and the audio output levels can be configured to increase/decrease with the volume setting of the TV. So my question is, can I hook the audio out lines of the TV directly to the amplifier, in essence using my TV as the preamp?