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录像机的系统控制电路用微处理器进行控制。我们以松下 NV-L15机(以下简称 L15机)的系统控制电路为蓝本进行介绍。录像机的系统控制电路在早期产品中,如松下NV-370、日立 VT-330等使用的是四位微处理器,其主要功能有:1.完成重放、记录、静像、快进、快倒等功能操作;2.与定时器电路组成节目的定时录像;3.实现功能、时间、走带和故障等功能显示;4.检测机内各种状态,及时处理机械、电器部分发生的异常现象,及时发出保护指令。录像机的发展在系统控制电路的基本型式上无大的变化,但功能大大地扩展了,增加了变速慢快、逐帧重放、慢速倒放(松下 J2(?)机)、半速录放、定时一个月八个节目等功能。
VCR system control circuit with a microprocessor control. We are Panasonic NV-L15 machine (hereinafter referred to as L15 machine) system control circuit based on the introduction. VCR system control circuit in the early products, such as the Panasonic NV-370, Hitachi VT-330 is the use of four microprocessors, its main features are: 1. Complete playback, recording, still image, fast forward, fast Down function and other functions; 2 timer recording circuit with the program; 3 function, time, tape and fault display; 4 detection of the machine state, timely processing machinery, electrical parts of the exception Phenomenon, issued a timely protection directive. VCR development in the basic type of system control circuit without major changes, but the function has been greatly expanded, increased speed slow, frame-by-frame playback, slow reverse (Panasonic J2 machine), half speed record Put, regular eight programs a month and other functions.