| 摘要 |
<p>PURPOSE:To eject a cassette securely, by moving a head base to a reference position speedily only through minimum processing in case of a power supply voltage drops and during cassette ejection. CONSTITUTION:By the ON signal of a switch PLAY, a microcomputer 12 sends a signal to a forward/backward driving circuit 24 so that a motor 1 rotates up to a position PLAY. Through the rotation, a photoreflector 18 receives light from a reflecting plate 1 and then while signals for detecting positions FF/REW and PAUSE are inputted to the microcomputer 12 through a Schmitt circuit 15, and a PLAY position detection signal is inputted to the microcomputer 12, which stops the motor 1 through the driving circuit 24 to hold the head base at the position PALY. When an EJECT switch 13a is turned on, or when a detection signal is sent from a power voltage drop detecting circuit 20, the microcomputer 12 controls the driving circuit 24 preferentially to move the head base to the position STOP and also performs muting control preferentially.</p> |
