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一台孔雀牌KQ51—39—5彩电光栅时有时无。据用户讲:此机经多个修理部维修过,检查不出什么原因?说是显像管内部接触不良。我说:既然多个修理部都未修好,按“死马当活马”医吧! 检查电路板,发现开关电源变压器、电源厚膜块、行输出变压器、行管、行扫描IC201(μPC1423CA)、视放集成块HM0005等都换过,此时开机测量行管c极
A Peacock brand KQ51-39-5 sometimes without color TV grating. According to the user: This machine was repaired by multiple repair department, check out what the reason? Said poor internal tube contact. I said: Since more than one repair department are not repaired, according to the “dead horse”! Check the circuit board and found that the switching power supply transformer, power thick film block, line output transformer, line management, line scan IC201 (μPC1423CA) , Depending on the integration block HM0005, etc. have changed, then start measuring line c pole