What if the led lamp doesn't shine
LED the working voltage is usually about 3 v, the circuit generally take three or six string a string, each string of working voltage is 12 v or 24 v, unwrapped desk lamp, look at the inside of the circuit can be known. If is the transformer working have to be replaced,
LED lamp light is usually a lamp is broken, no inspectors according to the following steps to do. 1, before open the LED, measure the power supply voltage, and current through the LED. 2, then open it, each check all key parts: drive or power supply, LED lamp bead, change all the broken lights. 3, find out the failure reasons of LED lamp bead, if flow, immediately minish the drive current. Check whether the drive is defective, also want to find out the reason, can the trim, can't repair the replacement
If it is a line break have to pick up, if there is black spots is the LED surface that is was burnt out, that is about to change the LED. Many of the LED circuit adopts the series circuit, that is to say an LED bad throughout the series circuit will not bright. Generally LED not easy bad, usually a transformer is the most easy to bad. Open it and see it
