punkieys17
- Feb 7, 2016
- 45
- Joined
- Feb 7, 2016
- Messages
- 45
Trying to repair this uplighter LED array for a friend. I am suitably puzzled. Mains at 230Vac comes in via 2 fuses and I measure 211VDC at the pins of the bridge rectifier. I can then follow the circuit from the positive terminal of the bridge rectifier via 28 LEDs in series to the negative terminal of the bridge recitifier. This suggests a forward voltage of some 7.5V. I cannot find a 7.5V SMD LED. Secondly what is the function of the 3 Mosfets which are labelled D2002.....the circuit appears to be a serial string of LEDs so what are the Mosfets for? Any help greatly apprciated![20221114_211204[1].jpg 20221114_211204[1].jpg](https://maker.pro/forums/data/attachments/55/55429-30db1bc4ebd6b18732082c8136498828.jpg)
![20221114_211204[1].jpg 20221114_211204[1].jpg](https://maker.pro/forums/data/attachments/55/55429-30db1bc4ebd6b18732082c8136498828.jpg)