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SMD LED diode in use, will encounter many problems. Such as the problems caused by the power supply is not normal:
1. Check whether the power of the power supply working state is normal, whether light is lit up. But if it didn't light up, it need to check whether the power connection is normal.
2。 Check the power supply is the cathode is connected to the power cord is normal, look to whether reverse phase. If yes, just connect it correctly.
these are an introduction to the problem of power supply caused by abnormal, you know?
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