LED display is a common decorative material for building lighting projects in urban buildings. It has a hollow strip shape with good light transmission, ventilation and lighting effects. It is also a high-end outline of glass curtain wall construction and building wall decoration. Display products, so LED light bar screens can also be called LED hollow screens, LED curtain wall screens, etc.

     Curtain wall LED displays play a very important role in urban lighting, but many people are not very familiar with LED displays, especially the fault detection methods of LED displays. Let Topsun Optoelectronics introduce you to LED curtain walls. Four detection methods for screen failure.

1. Detection method for short circuit of LED display manufacturers

Short-circuit failure is a common problem in curtain wall LED light strips in architectural decoration lighting projects. The general detection method is to set the multimeter equipped with alarm function to short-circuit detection mode, and then check whether the LED display has short-circuit problems. If so, should Solve it as soon as possible; or choose the method of connector pin and IC pin to detect, this kind of LED display voltage detection method is simple and efficient. Note that no matter which method is used, it should be operated under the condition of power failure to avoid damage to the multimeter.

2. Voltage detection method for LED display manufacturers

To detect the voltage of the LED display screen, you can first set the light bar screen multimeter to the voltage file, and then detect the line that may be faulty, and compare the final value with the normal voltage value to get the fault range of the LED glass curtain wall screen.

3. LLED display manufacturers detecting resistance method

In the same way, the resistance detection of the LED display screen is to borrow a multimeter first, set the measuring instrument to the resistance file detection, the method is to first detect the resistance value of the normal circuit board from a certain point to the ground, and then take the same circuit board Perform detection at any point and compare the obtained value with the normal resistance value to determine the resistance fault range of the light bar LED display.

4. LED display manufacturer's diode voltage drop detection method

The voltage drop detection method of the LED display is to set the multimeter to detect the voltage drop. Since the integrated circuit of the LED display is composed of several miniaturized unit components, when the internal circuit of the chip and the wiring of the peripheral circuit have current flowing When the voltage drop occurs on the pins, usually the voltage drop on the integrated circuit pins of the same model is the same. We can judge the voltage drop value of the curtain wall LED display diode according to the pin test results.