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一则故障现象:日普RP2568-1型彩电,枕形失真,即图像左右两边内凹。检修:开机调节“枕校”电位器和行幅电位器均不起作用,测“枕校”输出管V411c极电压为2V,再测枕校二极管VD435A负极为零,随即发现此管已烧坏。用RU4高频二极管代换后故障依旧,此时测VD435A负极电压为0.7V,还是不
A failure phenomenon: Japan’s RP2568-1 type color TV, pincushion distortion, that is, left and right sides of the image concave. Overhaul: boot adjustment “pillow school” potentiometer and line amplitude potentiometer are not working, measuring “pillow school” V411c output tube voltage is 2V, and then test the school diode VD435A negative zero, then found this tube has been burned . Replace with RU4 high-frequency diode fault remains the same, this time measuring VD435A negative voltage is 0.7V, or not