Skyworth 29T9000 color TV, the inductor played a new trick this time - android - Phones Developers

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

inductance

Encounter a Skyworth 29TI9000 CRT TV, the phenomenon of failure: the width of the grating sometimes shrinks repeatedly, until the line stops, and then the line starts to oscillate, sometimes the grating does not regularly repeat the "eyes". Monitoring + B voltage is stable, further monitoring the BE pole voltage of the push tube, there is a change in the following, the replacement push tube and the push transformer fault remain, follow the base of the push tube back, to the big 33 feet After the output pin is disconnected, the voltage change of this path is lost, and the voltage of the output line of the monitoring block is not changed, and the fault is recovered. Detecting 39 large blocks, I found that the voltage is also unstable, and it is a bit low. Suddenly I feel that I have to find the fault, so I walked down the road and passed an inductor to the main road of 8V power supply. The detection of 8V voltage is stable. The last problem is concentrated on the inductor L200. It is a bit unusual to measure the resistance at both ends of the inductor. It is really unusual to take down and repeat the measurement. In the past, all the problems encountered were open circuits. This time it is different. It will be normal after the change.