A Panasonic rear projection TV TC-51P800G booted to hear high voltage start, immediately protect.
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Remove the cluster line and the TV is no longer protected. Explain that the problem is in the aggregation loop. Removed 3 sockets and found that one was burnt. The other two were slightly damp. After changing the three sockets, the TV set is not lit, the measurement acceleration voltage is only 80v (normally more than 200 points), the hand touches the focus and the hot, the focus is turned on or off, and the acceleration pole is only 150v. The hand touches the high voltage package and is hot. The high voltage package is turned on and the screen is very bright red retrace line. Remove the red tube tail plate and measure the cathode voltage 70v is very low. The acceleration pole 200v is normal, and the tail plate is very wet. This is the coolant that leaks from the projection tube. It is washed with banana water and then blown dry with a hot air blower. The brightness of the TV turned on is normal. In order to completely solve the problem, it is necessary to solve the problem that the projection tube leaks the coolant. The three projection tubes were removed and the coolant of the three projection tubes was found to be very bulging. The sealant cap is not damaged. This may be because the coolant pressure is too high and causes leakage. Remove the sealant cover. The coolant overflows. Use the toilet paper to absorb the excess coolant, then install it, adjust the power to adjust the convergence, and the repair is successful.
February 26, 2024