Konica-Minolta DI-2510F Displays code C0500

Question

Customer explained that the Code C0500 displayed after a paper jam was removed from the machine.

Everything checked seems to work fine but the code will not reset. I don't have a Service Manual for this particular unit. Is there a way of trying a Service Mode reset? What is the password (default) for entering the Service Mode and how do I get there?

Thank you for any suggestions.