Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
What is the label on the case near the 16-pin plug in question?
And, do you have a soldering iron and know how to use it in electronics repairs, to remove a defective component such as your broken plug from a circuit board, and then solder in the connections for the new component?
OK, and you have said you are located in Lebanon PA or that region. I am now researching locations and contact information for shops servicing Sansui receivers of that sort, in that area.
Here are results for your region:
Rice's Electronic Repair
Radio-Active Repair, LLC
Intrepid TV Repair Inc.
Kasper Tv & Appliance
York Electronic Service
Dohm Radio - TV Svc.
Ray Sweeney Electronic Services
Ed's TV Sales
If you want to repair it yourself, please tell me what is on the case near the broken plug... so that I can identify it. ?