Casio HR-8A Printing Calculator with Adapter (NEEDS REPAIR/WORKS)

Casio HR-8A Printing Calculator with Adapter Calculator does work but printing does not. Cartridge seems stuck but not familiar with them so not sure if can be fixed or not? Can still be used as regular calculator. Comes with Adapter or takes 4 "AA" batteries but DID NOT test with batteries. Terminals need some cleaning I noticed.