JPS57147163A - Record player - Google Patents

Abstract

PURPOSE:To avoid a stylus of a cartridge from being damaged, by eliminating the need for manual rotation of a turn table at program seach, through the turning of the turn table with almost the same angle as a rotating angle of a knob. CONSTITUTION:A driving motor 3 of a turn table 1 is controlled with an output comparing an electric output in response to the rotating angle of the turn table 1 and an electric output Ev in response to the rotating angle of a manual knob 6 so that the turn table 1 turns with almost the same angle as the rotating angle of the knob 6. For example, magnetic pulses P recorded on a circumference 2 of the turn table 1 are detected at a magnetic head 4, and pulses Pw amplifying 8 and wave-shaping 9 the pulses P are counted 10 and D-A-converted 11. The output is applied to a comparison circuit 12. On the other hand, the said voltage Ev is applied to the comparison circuit 12 and the differential amplified output is applied to the motor 3 via a motor driving circuit 14.