I'll see if I can give you some help. Two thoughts come to mind, plus one general comment...
First, I will assume (just to cover all the bases) that the TV has a stereo audio line in on it. If that is not the case, we'll need to back up a good long way.
Second, the level of the preamp outputs is regulated by the 1050's volume control, and the line inputs on a TV will be regulated by the TV's volume control. Because of this, using the preamp outputs will tend to leave you with a very reduced signal coming to the TV's input, which it may not be able to do anything with. The preamp outputs are meant to go directly to a power amplifier, which does the heavy lifting without any other adjustments - and that doesn't really match what happens with the TV's line inputs. If you are using the 1050 to switch sources for the TV, you may have greater luck using the audio output for the VCR or tape (tape may be most convenient, in case you have a VCR in the system already). These outputs pass the unadjusted signal from the active input, which the TV could them control more readily. One caveat here, however - these outputs (unlike the preamp outputs) do not pass digital audio signals, so if you have a DVD player, CD player, or other source with a digital audio cable connecting it to the 1050 you will need to swap that cable out for a pair of analog audio interconnects.
Based on what you have said so far, this is a somewhat unusual configuration for a receiver like the 1050 - in essence, it appears that you are using it only as an A/V switch for the TV. The 1050 is certainly up to the task, but it is capable of a
lot more - even just adding a pair of inexpensive bookshelf speakers (like the
Paradigm Atoms or Titans or the Axiom
M2i\'s , as a couple of examples) and allowing the 1050 to act as audio source (switching, volume control, and amplification) and video switch would give you a
really nice upgrade in sound.