Four ways to test interactive LED floor

With the improvement and application of LED electronic display screen and led full-color screen, LED display screen has become a beautiful scenery line in today's information society. Especially when night falls, LED display screen blooms a brilliant picture, so that people can feel the colorful world. However, with the continuous expansion of the application scope of LED display screen, there are more and more problems in LED display screen. So how to test the problems of LED display screen? The following is a brief introduction from the manufacturer of LED display screen.

1. Resistance detection method: adjust the multimeter to the resistance gear, detect the ground resistance value of a certain point of a normal circuit board, and then detect the same point of another same circuit board to test whether the resistance value is different from the normal resistance value. If it is different, the scope of the problem is confirmed.


2. Voltage detection method: adjust the multimeter to the voltage level to detect the ground voltage at a certain point of the suspected circuit, and compare whether it is similar to the normal value, otherwise the scope of the problem will be confirmed.

3. Short circuit detection method: adjust the multimeter to the short circuit detection gear (some are diode voltage drop gear or resistance gear, which generally has the function of alarm) to detect whether there is a short circuit. If a short circuit is found, it should be treated first so that it will not burn other devices. This method must be operated when the circuit is powered off to prevent damage to the meter.


4. Voltage drop detection method: adjust the multimeter to the diode voltage drop detection gear. Because all IC is composed of many fundamental single components, it is only miniaturized. Therefore, when there is current passing through a pin, there will be a voltage drop on the pin. The voltage drop on the same pin of an ordinary IC of the same model is similar. According to the voltage drop value on the pin, it is necessary to operate when the circuit is powered off. This method has certain limitations. For example, if the detected device has high resistance, it cannot detect whether it is good or bad. It must be operated when the circuit is powered off. This method has certain limitations. For example, if the detected device has high resistance, it cannot be detected