The ice chute flapper is not opening. Can you tell me the part (the flap, the spring, the crank, the solenoid) numbers possibly involved? It's kind of difficult for me to tell the part numbers from the diagrams.
The most likely cause for the dispenser door not opening would be a seized solenoid 67883-3 that rusted or faulty. It could also be a faulty control board 61003072 on the dispenser. To determine which of the 2 it is you will need to test to see if the solenoid is getting the proper 120 vac. While the linkage could be an issue it is most likely not the cause.