Although LED display are very durable, computer software malfunctions may still occur during use, such as the entire screen not lighting up, the entire screen blurring, part of the area not lighting up, part of the area blurring, and the screen flickering. The following tips can be tested in four ways:
1. The Four Tips for Basic Detection Methods of LED Display
1. The scope of the problem can be easily determined by detecting the voltage detection error by adjusting the cmeter to the voltage range and detecting the voltage to ground at a certain point of the suspected circuit and comparing whether it is similar to the normal value.
2. Through short-circuit detection error, set the centimeter to the short-circuit detection gear (generally it has an alarm function, if it is turned on, it will beep), then check whether there is a module short-circuit phenomenon, and solve it immediately after it is found.
The short-circuit phenomenon is also the most common Module failure. Some can be found by observing the IC pins and header pins. And the short circuit detection should be operated when the circuit is powered off to avoid damage to the centimeter.
This method is the most commonly used method, simple and efficient. Most of the LED Display failures can be detected and judged by this method.
3. Through the voltage drop detection error, adjust the centimeter to the diode voltage drop detection gear, because all IC are composed of many basic single components, but are miniaturized, so when there is a current passing through one of its pins .
There will be a voltage drop on the pin. Generally speaking, the voltage drop on the IC pins of the same model is similar. According to the voltage drop value on the pins, it is necessary to operate with the circuit power off.
4. Through the resistance detection error, adjust the centimeter to the resistance gear, and check the resistance value of a certain point of a normal circuit board.
And then check the same point of another same circuit board to test whether the resistance value is different from the normal resistance value , If they are different, the scope of the problem is determined.
The above four points are summarized. I hope that these basic defections of LED Display errors will bring great help to customers and friends.
