| 摘要 |
PROBLEM TO BE SOLVED: To disable an unauthorized user to easily grasp circuitry for detecting a housing cover being opened and a control board being illegally energized. SOLUTION: This information terminal device is equipped with the control board which is installed in a housing and equipped with a control means and a memory means, a 1st abnormality detecting circuit which is provided on the control board, and a 2nd abnormality detecting circuit which is provided in the housing except on the control board and connected to the 1st abnormality detecting circuit, and the 1st and 2nd abnormality detecting circuits are electrically connected through the fixation parts of the control board and housing and the control means monitors the electric connection state of the 1st and 2nd abnormality detecting circuits and erases or overwrites the data in the memory means once detecting the electric connection is cut off. |
