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The four methods LED display failure
Addtime：2015/5/20 14:34:13
In recent years, the LED display on the stage, for example, in the 2015 Spring Festival gala using holographic projection technology, li shu embroidery, into the highest content of science and technology, the highest cost, one of the most popular programs. LED display blossom a bright picture of not only gives us audio-visual enjoyment, but also brings the audience again and again the art feast. But perfect things have not perfect, it is often said that one sentence, "key chain", if the LED display in the critical moment off the chain? Don't worry, quickly accepted the often use four tips to LED display fault detection.
1, voltage test: dispatch multimeter to voltage, detecting circuit at some point in question to the ground
2, short circuit test: when the power circuit, short-circuit test block, dispatch multimeter to test whether there is a short circuit, judge and forecast in time, if there is a short circuit phenomenon, should immediately to resolve the problem, avoid burn out of other devices.
3, resistance test: dispatch multimeter to resistance, detection a normal piece of circuit board of some point to the ground resistance, detection of another piece of the same circuit board of the same point test and normal resistance by different, if different can determine the scope of the problem.
Pressure drop test: will be transferred to the pressure drop of the diode detecting multimeter, because all of the IC is composed of the basic unit of many pieces, only the miniaturization and so on when a pin of it have electrical flow
1, voltage test: dispatch multimeter to voltage, detecting circuit at some point in question to the ground
2, short circuit test: when the power circuit, short-circuit test block, dispatch multimeter to test whether there is a short circuit, judge and forecast in time, if there is a short circuit phenomenon, should immediately to resolve the problem, avoid burn out of other devices.
3, resistance test: dispatch multimeter to resistance, detection a normal piece of circuit board of some point to the ground resistance, detection of another piece of the same circuit board of the same point test and normal resistance by different, if different can determine the scope of the problem.
Pressure drop test: will be transferred to the pressure drop of the diode detecting multimeter, because all of the IC is composed of the basic unit of many pieces, only the miniaturization and so on when a pin of it have electrical flow