Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
I would advise you first of all, to try several possible default value passwords/passcodes:
and see if any of these work - and let me know how it goes. I may be able to find other, more specific, default password ***** for this model.
OK. I am looking for other information...
One thing to try is to press PLAY and REC at the same time for 5 seconds.
Or follow this page's instructions (which include that but other steps too, and the steps are more elaborate):
Another thing to try, is to contact Panasonic and ask them how to unlock the owner PIN (if that is what the 4-digit passcode is).