| 摘要 |
PURPOSE: To prevent information stored in a terminal equipment and a managing host device from being stolen. CONSTITUTION: When a hard disk memory 49 is detached from a commander 31, a switch 53 is turned on and the contents of a static RAM 51 are destructed. Thereby the contents of the RAM 51 are changed to contents different from an original ID number and do not coincide with an ID number stored in the memory 49. In other cases, whether a KARAOKE (orchestration without lyrics) equipment 10 is connected to the managing host device or not is judged, and when the equipment 10 is not connected, a CPU 42 judges the existence of illegal use of the equipment 10 or the existence of illegal use preparing action, erases all the contents of the memory 49 to erase the stored contents in the RAM 51. |
