| 摘要 |
PURPOSE:To ensure the permanent discontinuation of the function for the apparatus and thus preventing the unfair remodeling, by installing the remodeling sensor to detect the remodeling analysis of the apparatus and thus fusing the circuit. CONSTITUTION:When the cover of the terminal is opened for remodeling, switch 40 is closed. As a result, the voltage of battery 39 flows to soluble conduction part 35 via switch 40, BRK terminal 32 and diode 36 each. With this overcurrent, part 35 is fused by the heat generation. Thus no conduction is secured at the source side of FET34 to VSS terminal 33. Accordingly, the function of FET34 is stopped. The conduction is never secured for part 35 even if the repair is given since it is incorporated into the circuit pattern of LSI30. And even if the remodeler gives the conduction between terminal 32 and VSS terminal 33, the source side of FET34 has no conduction to terminal 33 since diode 36 is set backward. In order to use the terminal again, LSI30 must be replaced. In such way, the unfair remodeling can be prevented. |
