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彩电行输出管烧坏后,在更换前要首先排除引起烧坏行输出管的原因。烧坏行输出管的原因有: ——开关电源+B输出电压偏高,引起行逆程脉冲电压升高,造成行输出管击穿——行输出管负载有短路性故障,如行输出变压器负载短路、性能不良,行偏转线圈短路、S形失真校正电容漏电等,均会造成行输出管电流过大而损坏。
After the color TV line output tube is burned out, the reason that causes the burnout line output tube should be excluded before replacement. The reasons for burning out the output tube are as follows: - The high output voltage of the switching power supply + B causes the reverse pulse voltage to rise, resulting in the breakdown of the row output tube. - The output tube has a short circuit fault, Load short circuit, poor performance, line deflection coil short circuit, S-shaped distortion correction capacitor leakage, will cause the line output tube current is too large and damaged.