| 摘要 |
<p>PURPOSE:To display clearly the working state of a VTR with the effective use of a pair of displays, by changing a tape counter display part to an abnormal display specified when a fault is detected. CONSTITUTION:When the condensation detecting signal is applied from a condensation sensor 25 of a VTR7 of a tape counter display part 2 is switched to the lease significant digit of a liquid crystal to display a condensation generation with a specified display via a microprocessor 28, a driver TC30, etc. A specified display given with the most significant digit DP4, the state of the voltage drop, etc. are displayed in the same way through bar display parts B1-B4, etc. in case the voltage of a battery 4 drops less than the function securing limit value via a power supply switch circuit 26, an A/D converter 27, etc. In such a way, the working state of a VTR can be clearly displayed with a simple constitution by switching effectively a pair of displays to show various types of a faults.</p> |
