E14 LED rangehood lamp autopsy and alternative
2,388 views · Published 31 May 2015 · 5:36 · Indexed 10 November 2026
Channel: RODALCO2007 · 2015 · Science & Technology
I bought two of these lamps about 8 months ago, for our kitchen rangehood and to my surprise they both failed at more or less the same time. ( see link below ) Firstly. I have taken them apart to see what caused the lamps to fail. The 5050 LED clusters are neatly packed but some led chips were a bit discoloured. Interesting was the large Capacitance 1 uF and 820 nF in parrallel, a tiny 270 R inrush resistor ( which was not open circuit ) As can be seen is that some LED chips have partially failed and some have gone fully open circuit. Also I noticed reversed polarity to the internal lamp circuit-board. Secondly. What to do next ? I had some 12 Volts LED strip-lights with 5050 led chips left over from an other project. So my resolution was to build a simple 240/12 Volts TX supply with rectifier. Fitted the devices and all works well. https://youtu.be/8E6SiJt854U Link to the video when I fitted the lamps. That was Sept 2014. I created this video with the YouTube Video Editor (http://www.youtube.com/editor)
