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使用单片集成电路MC13007或TDA4500的黑白电视机,具有元件少、调试简单、性能稳定可靠的优点。但这种集成电路内部功能多,集成度高,如稍有故障,都将造成整机无法正常工作,况且使用此电路生产电视机的厂家,在说明书的电路原理图中均没有绘出集成块的内部功能图,所以在检修时遇到很大困难。本文以 35D8-6型(或 35D2-2F型)机为例,对该电路的多发故障(有声无图)的检修作一个系统分析。
Monolithic integrated circuits using MC13007 or TDA4500 black and white TV, with fewer components, debugging simple, stable and reliable performance advantages. However, this integrated circuit has many internal functions, high integration, such as a slight fault, will result in the machine does not work, Moreover, the use of this circuit to produce TV manufacturers, in the manual circuit schematic are not drawn manifold The internal function chart, so in the repair encountered great difficulties. In this paper, 35D8-6 type (or 35D2-2F type) machine as an example, the circuit of multiple failures (no sound) overhaul for a systematic analysis.