| 摘要 |
PURPOSE:To detect and display the place on a printed circuit substrate where a connector is pulled out, easily and surely, by using two sets of connection pins between a pair of the connectors as pins for a detection signal line connected to a detection circuit. CONSTITUTION:Two sets of connection pins of a connector (b) of a printed substrate 1 and a connector 6' to be connected thereto in the position of 180 deg. with each other are used as pins for a detection signal line and are connected and short-circuited to each other by a connection signal line C'. The detection signal through the signal line C of the substrate (a) is thus detected through the line C' in a line C'' only in the case when a pair of the connectors b, b' are connected without pull-out. The place of the printed circuit substrate where there is the pull-out of the connector is detected and displayed surely with the above- mentioned constitution. |
