How to detect the failure of LED lights?

Fault detection of LED lights should follow the following steps:

1, LED light fault, should first determine the location of the fault, in the end in the drive circuit or in the LED light string. As long as it is powered on, use the voltage file of the multimeter to check whether there is output voltage at both ends of the LED lamp string to determine.

2, if it is a driver circuit fault, then carefully analyze according to the specific circuit, determine the fault original, and replace it.

3, if the drive circuit has an output voltage, and the LED string does not emit light, there is a LED string fault. Because the LED light string is working in series, if there is an individual bad quality in the middle of the burn, it will cause the whole is not bright. The detection of the LED string is also relatively simple, and can be measured with the resistance or diode file of the multimeter. The diode file of the digital meter can even make the normal LED light slightly, and directly observe whether it is normal. After determining the bad LED lamp bead, replace it with a good one.

Further information:

LED is the abbreviation of English light emitting diode (light-emitting diode), its basic structure is an electroluminescent semiconductor material chip, solidified to the bracket with silver or white glue, and then connected to the chip and circuit board with silver or gold wire, and then sealed around with epoxy resin to protect the internal core wire. Finally, the shell is installed, so the seismic performance of the LED lamp is good. The application field involves mobile phones, lamps, household appliances and other daily household appliances and machinery production.