| 摘要 |
An optical disk apparatus has a detector for detecting absence of an optical disk in a prescribed position, a detection circuit for detecting non-rotation of the disk and an AND circuit for producing a logical product of the outputs from the detector and detection circuit. The detector comprises a light-emitting diode and a light-receiving element. An output signal from the AND circuit is supplied to a beam source driver/control circuit, thereby turning off a beam source. |
