Sell official product ►✘1pcs 5-24V universal power module 14-60 inch LCD TV, display adjustable universal best price

Remove the original switch tube and damaged components, keep the switching transformer, absorption circuit and input and output rectifier filter circuit, and check whether it is intact, there are problems to be repaired. Fix the module to the heat exchanger of the original switch tube and ensure that the power tube on the module is in close contact with the heat sink for heat dissipation. The red line on the module is connected to the D-pole pad of the original switch tube, and the black line is connected to the negative pole of the 300V filter capacitor (hot ground). The yellow line and the blue line are connected to the output main voltage 5-24 filter capacitors at the positive and negative ends, the yellow line is connected to the positive pole, and the blue line is connected to the negative pole (cold ground). Disconnect the load, install a 3-5W220Ω resistor on both the positive and negative ends of the main voltage output to make a dummy load (the low voltage is not easy to start when this resistor is not applied), and power on. Normally, the main voltage output is about 4.5V. Adjust the adjustable resistor on the module clockwise, the voltage will gradually increase. According to the requirements of the repaired model, the main voltage will be adjusted to the appropriate value, and the other output voltages will be automatically matched. . After adjusting the voltage, the power is turned off, the dummy load is removed, the original load is turned on, and the machine is tested again. common problem Boot does not start. At this time, check whether 300V is normal. If it is normal, check whether the components connected to the output windings of the switch transformer are short-circuit damaged. Check whether the output rectifier is broken. If the fault cannot be eliminated after the inspection, it may be a short circuit inside the switch transformer. You can try it instead. There are noises. After installing the module, the lift-off transformer emits a “beep, bang” sound. In this case, first check whether the original absorption circuit has a problem. If there is no problem, you can change the value of R2 on the module. The R2 resistance can be Choose between 0.22Ω and 2.2Ω, and the power can be 2-3W. The value of R2 resistance will affect the output power of this module. The larger the resistance, the smaller the output power of the module. Therefore, when adjusting the resistance of R2, it should be gradually increased from small to no noise. Can not remotely shut down. At this time, you can use the 5-24V module of the 5 lines produced by our factory