| 摘要 |
PURPOSE:To execute the centralized control of source equipments by forming the centralized control device of a system component stereo unit of a centralized control circuit, an operation instruction circuit, a signal selector and a keyboard. CONSTITUTION:A centralized control circuit 1 is a microprocessor consisting of a CPU, a ROM, a RAM, etc. An operation instruction circuit 2 is an interface between an equipment that converts digital output from the circuit 1 to, for instance, decimal number, and gives operation instruction to equipments such as a tape recorder 4, a record player 5, an AM tuner 6, an FM tuner 7, etc., and the circuit 1. A signal selector 3 controls the volume and tone quality of analog signals from each equipment by digital output from the circuit 1, and executes signal selection from each equipment. A keyboard 8 is an external selecting device by which a listener gives operation instruction to each equip ment. Thereby, centralized control of source equipment can be performed.
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