| 摘要 |
<p>PURPOSE:To prevent useless consumption of battery, by conducting a motor in a deck when a key switch of a car is turned off to eject a cassette automatically. CONSTITUTION:When a key switch is turned off while loading the cassette, and the power supply for the 2nd power supply terminal 8 is interrupted, first a transistor(TR)9 is set off, then a base current flows from the 1st power supply terminal 7 to the base of a TR20 via a switch 2a, a resistor 12, a diode 13, a capacitor 16 and a register 18, then the TR20 is turned on, a base current flows to a TR23 via a resistor 22, the TR23 is turned on. Further, a backup power supply is automatically connected to the motor 5 from the 1st power supply terminal 7 via a solenoid 4 and a diode 24, to eject the cassette.</p> |
