Judging by the driver chip
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The core of LED light driver is IC, and the quality of IC directly affects the whole led light driver.
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Judging by the transformer
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The transformer determines the power and temperature resistance, and is responsible for the conversion between alternating current - magnetic energy - direct current, and energy overload will saturate the machine.
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Judging by electrolytic capacitor and chip ceramic capacitor
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Judging by the circuit design and welding process of the power supply product
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Through the batch detection of power products aging rack and high temperature aging room to judge
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Through the aging of the whole batch of power supply and the high temperature random inspection of the high temperature room, the quality stability of the power supply and whether the material has safety risks are detected.
A multimeter can be used to measure the voltage of the dry driver. If the voltage is in line with the marked voltage, the drive is normal; otherwise, it is bad. If the driver is normal and the light is not on, the LED light is bad. Just change the light.
The most reliable judgment is to use a multimeter to measure the output voltage of the driver, if the test value is the same as that marked above, it indicates that the driver is good. Otherwise, the drive is broken.
You can use a multimeter meter to measure the voltage of the driver output terminal when the power input voltage is normal. If the normal light is not on, the light bar is damaged. If the output voltage is abnormal, the driver is damaged
To judge whether the led ceiling light is good or bad, you can measure the LED light input power. The method is:
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1, open the switch, multimeter to measure the control line and the neutral line, if there is voltage, the light is not bright, basically can determine the lamp is damaged.
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2, with the elimination method, the lamp is installed on other normal working lights. Judge whether the initiator is burned out: short-circuit the initiator with the lead line. If the indicator is on, it indicates that the initiator is damaged