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Truck Mobile Advertising Led Display Repair Detection Method

Jan. 08, 2019

1. Short-circuit detection method, adjust the multimeter to the short-circuit detection block (generally with alarm function, if it is turned on, it will sound a beep), detect whether there is a short circuit phenomenon, and find it should be solved immediately after the short circuit. Short-circuit phenomenon is also the most common P7.625 SMD Indoor LED Display. The display module is faulty. Some can be found by observing the IC pin and the pin header. Short-circuit detection should be performed in the event of a power failure to avoid damaging the multimeter. This method is the most commonly used method, simple and efficient. 90% of the faults can be detected by this method. 2. Resistance detection method, adjust the multimeter to the resistance file, detect the resistance value of a certain point of a normal circuit board, and then test whether the same point of the same circuit board is tested differently from the normal resistance value. If it is different, the scope of the problem is determined.

3. Voltage detection method, adjust the multimeter to the voltage file, detect the voltage to the ground at a certain point of the circuit suspected of having a problem, compare whether it is similar to the normal value, and conveniently determine the range of the problem.

4, the voltage drop detection method, the multimeter is adjusted to the diode voltage drop detection file, because all Truck Mobile Advertising Led Display are composed of a basic number of unit parts, but miniaturized, so when there is current on one of its pins, There will be a voltage drop across the pin. Generally, the voltage drop on the same pin of the same type of IC is similar. According to the voltage drop value on the pin, it is necessary to operate under the condition that the circuit is powered off.

Truck Mobile Advertising Led Display

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