Block diagram of radio digital control system

Usually the digital control system of the recorder is based on a single-chip microprocessor ( CPU ) and consists of a keyboard (key matrix circuit), a remote control transmitter
and a receiver, a reel motor , a capstan motor and its servo circuit, a loading motor and an electromagnetic It is composed of iron and its driving circuit, D/A converter
and recording and playback circuit, sensor and its interface circuit, reset circuit, etc.