Maintenance system, and computer readable recording medium storing a maintenance program

A maintenance system, comprising:

• an IC card unique to a service person;
• a general purpose mobile terminal device;
• an image forming apparatus as a maintenance target;
• and
• an authentication server;
• wherein the general purpose mobile terminal device comprises:
• a wireless communication unit capable of communicating with the authentication server;
• a peripheral device interface capable of communicating with the image forming apparatus;
• an IC card reader configured to obtain IC card identification information of the IC card;
• and
• a maintenance authentication processing unit;
• wherein the maintenance authentication processing unit (a) obtains the IC card identification information using the IC card reader, (b) transmits the obtained IC card identification information to the authentication server using the wireless communication unit, (c) receives user rank information corresponding to the IC card identification information from the authentication server, and (d) transmits the received user rank information to the image forming apparatus using the peripheral device interface;
• the authentication server manages the IC card identification information corresponding to IC cards of the service persons and the user rank information of the service persons so as to associate the IC card identification information and the user rank information with each other in a database, and when receiving the IC card identification information from the general purpose mobile terminal device, determines the user rank information corresponding to the received IC card identification information using the database and transmits the determined user rank information to the general purpose mobile terminal device;
• and
• the image forming apparatus receives the user rank information from the general purpose mobile terminal device, determines a usage permission range corresponding to the received user rank information, and permits usage of a maintenance function restricted to the usage permission range.