| 摘要 |
PURPOSE:To protect the stylus tip of a cartirdge and make a timer operation possible, by controlling operations of the tone arm and the turntable according to the program corresponding to the rotation position of the tone arm and the lifter position CONSTITUTION:When the rotation position of the tone arm and the vertical position of the lifter are detected by the optical system, etc., a program stored previously in a control unit is read out to perform processings, and required program control for the tone arm driving motor, the lifter motor, the turntable driving motor, etc., is performed. Consequently, the stage to cause damage of the stylus of the cartridge, for example, a case where the tone arm descends to the region other than the part where the record disc is mounted on the turntable to start rotation of the turntable can be prevented. Further, the timer operation, etc., can be performed easily by program control. |
