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成亮先生在2004年2期上曾说拔下行偏转线圈后用测电源电压的方法来判断行输出的短路故障,本人认为此法不妥。行输出电路部分所带负载比较多,除了行偏转线圈还有各种高、中、低电压,如:高压、聚焦电压、加速极电压以及视放供电、场输出供电和显像管灯丝的供电,而这些供电电压是依靠行输出级的正常工作才能产生的,行输出级正像一个开关振荡电源一样,行输出级的正常工作是靠在行输出管和阻尼二极管的作用,行偏转线圈与行逆程电容产生的LC阻尼振荡。如果拔下行偏转线圈,行输出级的阻尼振荡即消失,行输出级即停止工作,而作为行输出负载的行输出变压器和各种电压负载即停止工作,这些负载中即使有短路也不能发现。因此,行输出变压器短路自然就发现不了。
Mr. Cheng Liang said in 2004 two lines after the pull line deflection coil measured power supply voltage method to determine the line output short circuit fault, I think this method is not appropriate. Line output circuit part with more load, in addition to line deflection coil there are a variety of high, medium and low voltage, such as: high voltage, focus voltage, acceleration voltage and visual power supply, field output power supply and tube filament power supply, and These supply voltages depend on the normal operation of the output stage. The output stage is just like a switched oscillating power supply. The normal operation of the output stage depends on the role of the output tube and the damping diode. The deflection yoke and the line reverser LC Damping Oscillation Induced by Capacitance. If the line deflection coil is unplugged, the ringing of the output stage will disappear and the output stage will stop working. As a line output load, the output transformer and various voltage loads will stop working. Even if these loads are short-circuited, they can not be found. Therefore, the line output transformer short circuit can not be found naturally.