据笔者初步统计,应用在彩电上的场扫描输出集成块(简称“场块”)数量已达60余种。从简单的单端输入、单端输出的7个脚“场块”,比如常见的 LA7830,发展到双端输入,双端输出的9个脚“场块”,比如 TDA8359,直至利用总线控制的多功能15个脚“场块”STV9306,其功能不断增多其性能也更加优越。但这也给维修者带来一些问题,比如这么多“场块”能够归类吗?它们的引脚功能是怎样的?能否互换?互换时应注意哪些问题?这就是本文要谈的话题。 According to the author’s preliminary statistics, the number of field scan output manifolds (referred to as “field blocks”) used in color televisions has reached more than 60. From a simple single-ended input, single-ended output of seven foot “field block”, such as the common LA7830, developed to double-ended input, double-ended output of 9 feet “field block”, such as TDA8359, Multi-function 15 feet “field block” STV9306, its function continues to increase its performance is more superior. But this also brings some problems to the maintainers, such as so many “field blocks” can be classified? Their pin function is what? Interchangeable? Exchange should pay attention to what issues? This is the article to talk about topic of.