LCD TV universal switching power supply module universal DVD receiving subwoofer power board 5-24V

 

Description:

Suitable for maintenance of LCD TV 14-60 inch power supply within range of 5V-24V within 180W, including maintenance of switching power supply for LCD monitor, DVD, amplifier subwoofer, computer speaker, receiver set-top box, air conditioner, fax machine, etc.

5-24V universal power module

 

 

This module comes with optocoupler, which belongs to the DC sampling type and is stable as the original machine voltage. It is an upgraded version of the debugging-free module. It has small volume and large power and is suitable for output power below 180W.

Output maintenance of the 1460 inch main and auxiliary power supply of LCD TV in the range of 5-24V, including power supply maintenance of LCD monitors, DVDs, TV set-top boxes, households, air conditioners, fax machines, etc., as long as the original switch transformer is intact, secondary rectification The filter circuit and the load are used without short circuit.

 

installation method

1. Check that the original +300V voltage is normal, the switching transformer, absorption circuit and rectifier filter circuit should be intact, and the load is not short-circuited.

2. Remove the original airport effect tube or IC, fix the module to the original heat sink, and fix it. It is best to wipe the thermal grease to facilitate heat dissipation.

3. The red line is connected to the D-pole of the primary FET, the black line is connected to the 300V filter capacitor (hot) ground, the green gray line is connected to the secondary main voltage 5-24V filter capacitor at both ends, the gray line is connected (cold), the green line is connected. Positive (must be connected to the main DC voltage)

 

Debugging method:

After each connection line is correct, disconnect the load and test it separately. Turn on the main voltage of the power supply from about 45V. (If the voltage is slightly unstable at the beginning, it is normal, you can continue to adjust, the voltage will be stable when adjusted), adjust clockwise Resistor, voltage gradually rises, adjust to the required voltage volts to connect to the load test machine, the other sub-voltage will automatically match, if not matched, you can check the load of the unmatched voltage and the filter circuit with or without short circuit leakage. (There may be a 2-5W220 ohm resistor on the main voltage to make a dummy load if the individual machine does not start at low voltage)

 

 

No output or low voltage repair steps