5-wire universal LCD modification module LCD power board modification small module CA-888

1： Purpose: To solve the problem of power failure and maintenance for 15-21 inch LCD displays
The damage to the power board of LCD displays accounts for a large proportion. Among them, power drive chips, high-power power switch tubes, sampling resistors, and other components are most commonly damaged. Due to the wide variety and models of these components, they are often unable to be repaired due to the lack of identical spare parts.
We have developed a universal power module for LCD displays in response to the needs of our customers. This module has the advantages of simple wiring, convenient installation, time-saving, and improved maintenance success rate. Friends who encounter the above maintenance difficulties may consider the universal power module we have developed.
2、 Pin Definition
1 pin yellow wire: DRAIN, power control terminal, connected to the original high-power MOS power supply tube D-pole. Usually the middle pin of the power switch tube
2-pin black or pink wire: GND, module ground wire 300V, connected to the negative pole of the capacitor, can be used on the same line. Directly connect the negative electrode of the large filtering capacitor
3-pin red wire: VCC, module power supply end, connected to the positive pole of the rectified capacitor at the feedback winding end, continuously supplying power, with a voltage between 12-18V.
4-pin white wire: FB, voltage regulator feedback, connected to optocoupler 4 pin. Please confirm that optocoupler 3 pin is connected to a hot ground. If it is not a hot ground, short circuit the optocoupler to a hot ground and disconnect the peripheral circuit of pin 4.
5-pin green wire: Start the starting pin and connect it to the positive pole of the+300V capacitor
Customers must carefully consider the specific connection method before making modifications, and do not blindly connect them randomly. If you don't understand, please refer to the circuit diagram below and read it a few more times!