| 摘要 |
A code signal is intermittently recorded on each recording track of a video disc so as to indicate a groove number. The code signal is picked up by a stylus and is detected by a code signal detector. The detected signal is supplied to a time converter and is converted to detected time data. When the code signal cannot be detected, a detection signal from an arm position detector is used to produce detected time data. Meanwhile, assigned time data is produced by a keyboard and a key input processing circuit. Part of the assigned time data is corrected by a correcting circuit so as to decrease the speed of an arm mechanism before a desired track position. The detected time data and the assigned time data are supplied to a comparator from their upper bits through first and second data selectors, respectively, and are compared. The comparator produces a control signal every time a coincidence is detected. The control signal is suppled to a motor drive circuit through lines so as to decrease the speed of an arm motor.
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