| 摘要 |
<p>PURPOSE:To prevent thermal deformation in a tape, and to prevent inconvenience from occurring in a reproducing time, by pulling back the tape by connecting a loading motor control circuit to a battery by a switch control device through a switch circuit when a switch is turned off. CONSTITUTION:By turning off an accessory switch 8, a relay 9 is turned on, and a current is supplied to the collector of a switching transistor TR10. Meanwhile, by the rise of a voltage to the terminal T of a one shot multivibrator 23 in a pulse generation circuit 17, the terminal Q' of a switch control circuit 3 goes to 'H', thereby the TR10 being turned on. Therefore, the current is supplied to the terminal 16 of a loading-unloading change-over switch 24, and a motor 7 is started to rotate in a reverse direction. And when the tape is pulled back to a prescribed position, a completion switch 25 is made on, and a pulse is outputted with a pulse generation circuit 18, and the pulse is inputted again to the terminal CP of an FF19, and the terminal Q' is shifted to 'L', then the TR10 is turned off.</p> |
