Shenzhen Topstar Electronic Co., Ltd

How can LED display screens detect screen shorts?

1. LED display voltage drop detection method, which adjusts the multimeter to the diode voltage drop detection file, Due to the fact that all iCs arecomposed of many basic components, which are only very small, there will be a voltage drop on the pins when current passes through a pin.In generalthe voltage drop of the same plug in the same model of integrated circuit is similar. According to the voltage drop value on the plug, operation must becarried out during a power outage. This method has some limitations, For example, if the device being tested is high impedance,it cannot be detected.

2. LED display screen manufacturers share resistance detection method: place a mulimeter in the resistance range, detect the resistance value of a certainpoint on a circuit board to qround under normal circumstances, and then detect whether the resistance value at the same point on another circuit board idifferent from the normal resistance. lf there are differences, determine the range of LED display issues.

3. short circuit detection method for LED display scren: Set the multimeter to the short circuit detection block (either diode voltage drop block orresistor block, usualy with alarm function) to detect whether the LED display scren has a short circuit, When a short circuit occurs, it should be dealwith first to avoid burning other equipment, To avoid damaging the instrument, this method must be operated during power outage.

4. Voltage detection method: Set the multimeter to the voltage level, and the lED display screen manufacturer checks the point to ground voltage in thecircuit where the suspected LED display scren has malfunctioned, comparing whether it is close to the normal value; 0therwise, determine the scope ofthe problem with the LED display screen.