Alrighty…received and inspected, then read the instructions, and went ahead and installed the replacement Dinosaur Electronics 6212XX control board.
Happy to report the board is working as it should, my Norcold 1200 is now working off AC
Here is what the original board looked like, notice the burnt section.
https://live.staticflickr.com/65535/...f6644c_o_d.jpg