| 摘要 |
PURPOSE:To eject a cassette smoothly, by making the driving voltage of a motor higher than the normal during cassette ejection and in case of a power supply voltage drops, and thus moving a head to a position STOP at a high speed. CONSTITUTION:During ejecting operation EJECT, the on signal of a switch 13a is supplied to a control circuit 12. A photoreflector 18, on the other hand, detects the position of the head 8 by the reflection of light from a reflecting plate 17 and transmits its detection signal to a control circuit 12 through a Schmitt circuit 15. The control circuit 12 supplies a signal to rotate a motor 1 to the position STOP 1 through a forward/backward driving circuit 24 and also turns off a TR21 to switch a relay contact 23 from a 10V to a 15V power source. The motor 1 rotates at a high speed and the head 8 moves speedily to the position STOP. A power supply voltage drop is detected by a detecting circuit 20 and a signal is sent to the control circuit 12 through a deciding circuit 25. The control circuit 12 operates similarly to move the head 8 speedily to the position STOP by the remaining power source capacity. |
