| 摘要 |
PURPOSE:To prevent the breakdown of data by controlling the discharge signal for magnetic disk with the head loading signal and inhibiting the output of said discharge signal when the head loading signal is applied. CONSTITUTION:The head loading signal is supplied to an input terminal 14. The signal of the terminal 14 is inverted by an inverter 18 as long as the level of the terminal is kept at 1. Thus an AND gate 19 is never opened and a motor 12 is not driven although the disk discharge signal is applied to an input terminal 16. While the level of the terminal 14 is set at 0 when the record/reproduction operation is through and the head loading signal is released. Thus the disk is discharged. Therefore the disk is not discharged as long as the head loading signal is applied and although a disk discharge switch is pushed by mistake. Thus the data of the magnetic disk is never broken. |
