led 240v bulb failure

Discussion in 'General Electronics Chat' started by debe, Aug 18, 2016.

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  1. debe

    Thread Starter Well-Known Member

    Sep 21, 2010
    947
    184
    LED 240V BULB.JPG LED DRY JOINT.JPG LED.1.JPG LED.3.JPG LED.4.JPG LED.5.JPG LED.6.JPG This LED bulb is only about 8 mths old & started flickering so I decided to see why. On opening it up I find the electronics is set in a grey rubbery material. On dismanteling it I discover 2 dry joints, very similar to what I find in SMPS. Ive never had this trouble with the realy cheep Ebay Chinese ones as they use resistors to set the current, not an electronic module. Just posting this as an information exercise.
     
    Last edited by a moderator: Aug 19, 2016
  2. Marley

    Member

    Apr 4, 2016
    144
    40
    I have my doubts about some of these LED lamps. I've just started using some at home.
    Not only the crappy power supply but this is an 11W lamp! Where is that heat dissipated? Where is the heatsink?

    LEDs that run hot have a very limited life. The heat won't help the electrolytics either.

    LEDs can have a life measured in 25000 to 50000 hours. Not here!
     
  3. noam ezra

    New Member

    Jul 20, 2016
    7
    1
    This is a very strange flyback without the secondary . . How does it work ?
     
  4. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,347
    Hello,

    This thread violates the ToS.
    Both the leds to mains and transformerless powersupply will apply.

    Bertus
     
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