| 摘要 |
PURPOSE:To realize the quick detection for a faulty area, by recording a heat- sensitive track at the faulty area on the heat-sensitive paper on which a discrimination mark corresponding to the current supply unit or the unit of a printed board, etc. CONSTITUTION:The identification marks ID1-IDn corresponding to the faulty areas of a module parts unit constituting a certain device are printed on the surface of the heat-sensitive paper P. The heat generators H1-Hn consisting of resistors are installed or printed at the positions of marks ID1-IDn. A power supply +V is connected to terminals T1-Tn of the power supply side. When the alarm signal supplied from an alarm detecting circuit of the module parts unit is applied to input terminals I1-In, transistors TR1-TRn are turned on to supply the current to an earth G from the power supply +V. As a result, the areas of identification standards ID1-IDn are discolored to realize the quick detection for the faulty areas. |
