| 摘要 |
PURPOSE:To improve the operability, by performing button shutoff and power supply shutoff automatically, at the end of rewinding for a VTR. CONSTITUTION:When a power supply switch SW3 turns on, a power supply is applied to a power holding circuit 2 to drive a regulator circuit 1 and to keep a VTR rotatable. When an SW4 turns on, the power supply is applied to the circuit 2 via a diode D9. Even if the SW3 turns off, the circuit 2 is kept and the output of the circuit 1 keeps on-state. At the end of rewinding of a tape, a tape end detecting circuit 6 is activated, and a rewinding button is shut off with the operation of a button shutoff circuit 5, the SW4 turns off, the tape run stops, the power supply from the D9 is not applied to the circuit 2, the output of the circuit 1 goes off, and the VTR becomes inoperative. |
