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笔者根据自己的实际安装经验,谈一下一些常见问题的处理方法。一、安装后无图像常见的故障原因有: 1.地线未贯通:许多彩电利用了高频头的四只固定脚来沟通印刷线路板几处地线间的电气连接,如海燕CS54E—5—R、沈阳SDC47—10等机型,在安装增补高频头时,由于许多增补高频头与原高频头的外形尺寸不一致,其四只固定脚有时无法插到原孔内,此时若图省事只焊一两只脚往往会造成这种故障。另外还有一个很容易出现的故障,当用Ⅲ型的增补高频头代换Ⅱ型的普通高频头时,市面上一般均配售一块转换板,这种转换板笔者发现十之八九都没有沟通四个固定脚之间的电气连接,也就是说其中有两只固定脚是
The author based on their actual installation experience, talk about some common problems approach. First, there is no image after installation Common causes of failure are: 1. The ground is not through: Many color TV use of the first four high-frequency fixed pin to communicate printed circuit board several ground between the electrical connections, such as the Swallow CS54E-5 -R, Shenyang SDC47-10 and other models, the installation of additional tuner, due to many additional tuner and the original high-frequency head size is inconsistent, the four fixed feet sometimes can not be inserted into the original hole, this time If you save time, only one or two feet tend to cause such a failure. There is also a very prone to failure, when the use of Ⅲ type of replacement high-frequency head instead of type Ⅱ general high-frequency head, the market generally are placing a conversion board, I found this converter are ten to nine out There is no electrical connection between the four fixed feet, that is, two of the fixed feet are