Share: Skyworth LCD TV 42E361W three trouble-free repair - appliance repair - Huaqiang Electronic Network

DFN1006 TP-RCLAMP3321P ESD Diode Low Capacitance

Filter 18.432M

Repair Skyworth 42E361W LCD TV, movement 8R74, fault is three no, power board number 168P-P42ETN-01, the board only outputs 12 and 24 sets of voltage, teardown test insurance is intact, power test two sets of output completely no voltage 300V voltage is not discharged at all. After discharge, there is no short circuit at the voltage output terminal. Once again, the power supply block IC1's 5-pin starting voltage is 6V. The data should be above 18V, and the 5 feet should be picked up. The voltage of the 5 pin is still the same, indicating that the power block is normal, the fault is on the periphery of the 5 pin, and the peripheral R5, R6, R7, R12, R13, and R27 are normal, and the other two transistors have no obvious short circuit. Considering that the C6 is a 5-pin power supply filter capacitor, And the distance from the heat sink is too close, directly and a capacitor to go back to the test machine troubleshooting, the false load light is on, remove the original machine C6 (50V, 4.7UF), replace it with 50V, 10UF, and then measure the 5 feet of IC1 again Voltage 20V, output 12V and 24V everything is normal, pay attention to the board directly connected to the AC output 12 and 24V, no forced start, attach photos and power board drawings for your reference



Skyworth 42E361W power supply drawings.pdf