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根据笔者几年来的修理实践所作的维修记录,把在编制的速修卡中常见的故障现象举几个例子,供大家参考。 1.三洋83P机芯彩电,伴音或亮度旋钮调大,光栅收缩,其原因是电源厚膜块A_(301)性能不良或R_(329)变值。 2.三洋83P机芯彩电,光栅亮度低,图像模糊不清。其原因: ①显像管座漏电、聚焦极电压下降。如为此类故障,严重时显像管座后面有“吱吱”声。
According to the author’s repair practice over the past few years made by the maintenance records, compiled in the quick repair card common fault phenomena cited a few examples for your reference. 1. Sanyo 83P movement color TV, sound or brightness knob to adjust the grating contraction, the reason is the power thick film A_ (301) poor performance or R_ (329) variable. 2. Sanyo 83P movement color TV, grating brightness is low, the image blurred. The reason: ① seat tube leakage, focusing voltage drop. In the case of such malfunctions, there is a “creak” sound behind the tube seat in severe cases.