portions of the magnetic disk 76 aligned with the head windows 74 and 75 are exposed to the outside fig3 shows the reproducing system in fig3 reference numeral 76 denotes the magnetic disk on which video signals of one field are recorded in each of the circular tracks the magnetic disk 76 is rotated by a spindle motor 55 the video signals recorded on the magnetic disk 76 are reproduced by a head 13 the head 13 is driven by the drive motor 64 a stepping motor is used as the drive motor 64 the drive motor 64 is controlled by a head moving circuit 15 to which the invention is applied when a desired track is designated the head 13 can instantaneously correctly track and reproduce the video signals recorded on the designated track on the magnetic disk 76 this tracking control is described in detail hereinbelow the reproduction signals from the head 13 are supplied to a high pass filter 16 and a low pass filter 17 the frequency modulated luminance signal y is supplied as an output by the high pass filter 16 the frequency modulated line sequenced color difference signals r y and b y are supplied as an output from the low pass filter 17.