No matter how good the quality of a product is, it needs to make detection. In addition to the quality of the product itself, Detection and maintenance are also an important key to its lifespan. It is reasonable for LED displays to have problems like any other product. We need to better detect problems before they occur and do repair work in advance as much as possible. So what are the maintenance and detection methods for LED displays, and how should users do a good job in testing LED displays?
1. LED display resistance detection method
For the resistance detection method of the display screen, we need to adjust the multimeter to the resistance range, first detect the resistance value from a certain point on a normal circuit board to ground, and then detect the same point on another identical circuit board to see if it is consistent with the normal resistance value. There is a difference. If there is a difference, you know the scope of the display problem. Otherwise, ignore it.
2. LED display voltage detection method
The voltage detection of the display screen is to adjust the multimeter to the voltage range, detect the ground voltage at a certain point of the suspected and problematic circuit, and compare it with the previous one to see if it is normal. This way, the problem can be easily determined.
3. LED display short circuit detection method
The display short circuit detection method is to adjust the multimeter to the short circuit detection gear, so that you can detect whether there is a short circuit. If a short circuit is found, it should be solved immediately. The short circuit of the display screen is also the most common LED display module failure. In addition! Short circuit detection should be performed when the circuit is powered off to avoid damaging the multimeter.
4. LED display voltage drop detection method
The display voltage drop detection method is to adjust the multimeter to the diode voltage drop detection range. Because all ICs in the display screen are composed of many single components, when there is current passing through one of its pins, there will be a voltage drop in the diode. There is a voltage drop across the feet. Under normal circumstances, the voltage drops on the pins of ICs of the same model are similar.
For the above four LED display maintenance methods, we can keep them in mind and conduct inspections from time to time to avoid damage to our display and also extend the service life of our display. In this way, it can not only extend its use time, but also save the following unnecessary budget expenses.