The LCD screen not only has high definition, but also has a very good vertical texture, so it has become the mainstream of the modern electrical product industry. However, if the LCD screen is used improperly, it is very easy to cause damage. What is the problem with the damaged display screen? ? This requires some commonly used detection methods for detection. What are the common inspection methods for LCD screen flipper display repair?

Common inspection methods for LCD screen maintenance:

1. Short circuit detection method:

Set the multimeter to the short-circuit detection gear (generally with an alarm function, if it is turned on, it will beep) to detect whether there is a short-circuit phenomenon, and solve it immediately after it is found. The short-circuit phenomenon is also the most common display module failure. Some can be found by observing the ic pin and header pin. The short-circuit detection should be performed when the circuit is powered off to avoid damage to the multimeter. This method is the most commonly used method, simple and efficient. 90% of faults can be detected and judged by this method.

2. Resistance detection method:

Adjust the multimeter to the resistance position, check the resistance value of a certain point of a normal circuit board to ground, 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 it is different, it is determined The scope of the problem.

3. Voltage detection method:

Adjust the multimeter to the voltage range, check the ground voltage at a certain point of the suspected circuit, and compare whether it is similar to the normal value, which can easily determine the scope of the problem.

4. Pressure drop detection method:

Adjust the multimeter to the diode voltage drop detection gear, because all the ICs are composed of many basic single components, but are miniaturized, so when there is a current on a pin of it, it will exist on the pin. Voltage drop. Generally, the voltage drop on the same pin of the ic of the same model is similar. According to the voltage drop value on the pin, it must be operated when the circuit is powered off.

Only by using the above method to detect what is wrong with the LCD screen of the LCD screen flipper, can the next repair be carried out.