Skyworth color TV 34T66AA high voltage line fire fault repair - Home Appliances

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

Shunuo varistor / ESD varistor / product complete / Sunlord first-class agent

Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22

1.5PF SOT23-6 Low Capacitance 5V Breakdown Voltage 6V SRV05

Skyworth color TV 34T66AA boot appears 啪啪 discharge phenomenon, then three no. After inspection, it was found that the pipe was broken, and the high-pressure cap was observed to have no ignition marks. The main voltage was measured normally, and the reverse-pass capacitor had no problem. It was suspected that the high-voltage package had a discharge and sparking phenomenon. Replace the line pipe to disconnect the line current limiting resistor and connect the 100 watt bulb test machine. When the power is turned on, only the yaw around the deflection yoke is heard and there is a severe spark. How to deflect the fire is the picture tube hanging? Careful analysis should not, the general picture tube damage is only the blue light discharge inside the neck, and the high pressure will be reduced due to the fire, there will be no slamming sound. Careful observation revealed that the high-voltage line of this machine is very long and part of it is leaning against the deflection yoke. It is estimated that the high-voltage line is damaged and caused by high-voltage long-distance radiation. Clean the wire and observe that there is a small black spot. Then seal it with hot melt adhesive. The length should be as long as possible to the ends of the leakage point. Then apply a layer of 704 silica gel evenly. Don't be too thick. Finally, use insulating tape. The outside is tightly wound 2 and 3 layers. In order to prevent the glue from being degummed, it can be coated with a layer of silica gel. This method works well and is tried and tested.
All ready to boot everything is normal, but the fire did not cause damage to the field block or other circuits.