29 inch TCL color TV blue retrace line fault repair example - appliance repair - Huaqiang electronic network

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Today, I went to repair a TCL29 flat-panel color TV. The fault phenomenon is that there is a blue screen at the startup and there is a retrace line. After a few seconds, the power is turned off. Check that the video-discharge circuit has been repaired, and the blue gun has replaced all the components. Pull the lower socket to measure the blue gun and the filament foot with several hundred ohms resistance, indicating that the inside of the picture tube is in contact with the pole, because the filament is not able to be repaired by electric shock, so On the line output, the wire of the original machine is replaced by a wire around 3 turns, and the test machine grating has a slight color cast phenomenon. After entering the balance adjustment, the color of the image is restored as before, and the user is very satisfied.