Richard:
If yours is the same as mine...
Lift the jacknife sofa so that you can see in from the front.
There are 4 bolts at the ends, those go down into the slide floor to hold it all in place. Once those are removed, the whole thing is loose. You might get it through the door laid flat, but it will want to fight the passenget chair for space. (it may be easier to remove the passenger chair than to dismantle the couch)
The slide floor is held up by the slide end at its front, the cabinets at the back and two aluminum gussets trisecting the couch space. Those can't be removed and will need to become part of your tv cabinet or other plans. The floor isn't deep enough, IMHO, for a free standing chair to sit comfortably on it, and is too deep for such a chair to sit on the floor inboard of it, I don't know what else you were planning for the space, but without the couch, you will likely be down one, two or even three seating positions.
Again, these remarks only apply if yours is similar to mine.