| 摘要 |
<p>PURPOSE:To make a combined use of a display LED for detecting dew condensation on a rotary cylinder head used for recording/reproducing video signal and a display LED for detecting malfunction in a system control line, in a commercially used video reproducing devices such as those equipped in an aircraft, etc. CONSTITUTION:The display of operation is made easy by means of constituting the device so that the signals from a malfunction detecting circuit 20 provided in a system control circuit 12 and from a dew condensation detecting circuit 15 provided in an operation control circuit 13 are displayed in the conbined display, by an LED 17 which is connected in series to a switching transistor 16.</p> |
