It appears you have the same setup we had in our TT with a 32 inch Jensen TV mounted to the rotating platform with a fixed mounting bracket. Believe me it is very difficult to dismount because it is nearly impossible to get to the spring-loaded levers at the bottom of the mount.
I dismounted ours twice with the fixed bracket. The first time was extremely hard because I couldn't find anyone on this forum or elsewhere who knew exactly how to release the bracket. I finally bought a video snake and discovered the location of the levers. The next problem was figuring out how to get to the levers. If I remember correctly I finally was able to reach the levers from the bottom of the TV. Once removed, I disconnected the bracket from the old TV and installed the new 12 volt Jensen TV. It is pretty much the same TV only 12 volt DC instead of 120 volt AC because we like to dry camp.
I had to remove the TV the second time because we decided we wanted to replace the fixed bracket with a full-swivel bracket so we would have a better view of the TV while sitting at the dinette table. When I tried to disconnect the bracket using the same technique I used the first time I discovered the levers where too far up to reach them from the bottom of the TV. I finally had to use two wood rulers as fulcrums to release the spring-loaded levers. Thankfully my wife was helping me because it was a two person job. Once it was removed, I replaced it with this bracket Amazon.com: MOR/ryde TV1006H Double Arm Swivel TV Wall Mount: Automotive
This bracket is an overkill for the weight of the TV but it has a locking pin for traveling and does not twist out of alignment. I recommend this one because it is so solid. An added benefit is that the connectors on the back of the TV are now easily accessible.
Anyway, here are a few photos. Hope they help.