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【读者提问】何工:您好!我是一位对背投彩电维修不是很懂的家电维修人员。我发现背投彩电的故障,在很多时候都是会聚失真的故障。看见维修专家们双手舞弄着遥控器,很快就将问题解决了。您能不能介绍一种快速掌握会聚调试的方法好吗?谢谢!何敬松解答:这位同志说得很对。背投彩电的会聚问题是较多的,究其原因是由于地磁场的变化以及运输过程中光学器件的移位等因素导致“会聚”的轻微变化。该类会聚失真的校正非常简单,往往在会聚“细调”状态下调整即可!部分机型使用“九点会聚”调试法或者“灵智会聚”调试法也可以解决问题。但是,作为“工厂”会聚调试的过程就比较复杂。它必须经过总线调试、相位调整、粗调、细调、数据的存储与备份、动态聚焦调整、灵智会聚设定等步骤。调试时需要单独调整红、绿、蓝三种网格信号,然后再进行“会聚叠加”(即相应的红色或蓝色线条向绿色线条重叠),直至网格信号
[Reader Question] He workers: Hello! I am a home appliance repair staff who do not really understand the rear projection TV repair. I found the rear projection TV failure, in many cases are convergent distortion failure. Seeing the maintenance experts wield the remote control with both hands quickly solved the problem. Can you introduce a quick grasp of convergence debugging method? Thank you! Ho King-song Answer: The comrades put it right. The convergence of rear-projection TVs is more problematic because of the slight change in “convergence” due to changes in the geomagnetic field and the shifting of optics during transport. This type of convergence distortion correction is very simple, often in convergence “fine tune” state can be adjusted! Some models use the “nine convergence” debugging method or “smart convergence” debugging method can also solve the problem. However, the process of convergence debugging as a “factory” is complicated. It must be debugged by the bus, phase adjustment, coarse adjustment, fine adjustment, data storage and backup, dynamic focus adjustment, smart convergence and other steps. During debugging, three kinds of grid signals of red, green and blue need to be adjusted separately, and then “convergence superimposed” (that is, corresponding red or blue lines overlap the green lines) until the grid signal