With the popularization and application of LED electronic display and full-color LED screen, LED display screen has become a beautiful scenery in the information society, especially when night comes, lED display displays a bright picture so that people can feel the colorful world. However, with the continuous expansion of the scope of application of LED display screen, LED display screen fault problems appear more and more, so in the end how to test out the problem of LED Display Screen Fault? The following LED display screen manufacturers for everyone a brief introduction.

1, Resistance Detection Method, the multimeter set to resistance file, detection of a normal circuit board at one point to the ground resistance value, and then detection of another same circuit board at the same point test and normal resistance value is not the same, if not, the scope of the problem is determined.

2, Voltage Detection Method, the multimeter will be set to the voltage file, the detection of a suspected problem at a point of the circuit to the ground voltage, compared with the normal value is similar, otherwise to determine the scope of the problem.

3. Short-circuit detection method, set the multimeter to short-circuit detection block (some are diode voltage drop file or resistance file, usually with alarm function) , detect whether there is short-circuit phenomenon, find short-circuit should be the first solution, so that it does not burn other devices. The method must be operated in the event of a circuit failure to avoid damage to the meter.

4. The voltage drop test, which sets the multimeter to the diode voltage drop test, because all IC's are made up of a basic number of units, but miniaturized, so that when a current passes through one of its pins, there will be a voltage drop on the pin. Generally the same type of IC on the same pin voltage drop is similar, according to the pin voltage drop is good or bad, must be circuit power off under the circumstances of operation. The method has some limitations, such as the device being detected is high resistance, it can not be detected!