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Repair 220-240V LED Bulb: Burnt Component Diagnosis with Universal Meter & Soldering Tools

mitlex 3996 12
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  • #1 16744810
    mitlex
    Level 7  
    Hello, I have a question, the led bulb burned out recently, and since it's a led, it can also be repaired. I'm sending photos of the center. Hint what could have burned, I have a universal meter at my disposal, of course a soldering iron and a suction gun ;)
    Repair 220-240V LED Bulb: Burnt Component Diagnosis with Universal Meter & Soldering Tools Repair 220-240V LED Bulb: Burnt Component Diagnosis with Universal Meter & Soldering Tools Repair 220-240V LED Bulb: Burnt Component Diagnosis with Universal Meter & Soldering Tools
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  • #2 16744824
    Piotr2608

    Level 41  
    You have 8 elements crosswise on the board, just measure them with the meter.
    If they are in working order, look for damage on the LED module.
  • #3 16744899
    mitlex
    Level 7  
    Okay, I only know how exactly I can measure them, I'm really green in measuring the elements what values should they have and with what range to measure them
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  • #4 16744950
    tomek5333
    Level 13  
    Enter in Google how to measure the resistor capacitor, read the meter manual because these are really trivial questions
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  • #5 16745046
    398216 Usunięty
    Level 43  
    In 99% of cases, one (or several) of the LEDs fails. The remaining 1% is an electrolytic capacitor and a rectifier bridge. Nothing more.
  • #6 16745131
    mitlex
    Level 7  
    The leds are working, how can I measure this bridge because the resistors are working
  • #7 16745288
    398216 Usunięty
    Level 43  
    mitlex wrote:
    how can i measure this bridge
    Ohmmeter. As usual, LEDs.
  • #8 16746045
    mitlex
    Level 7  
    Okay, the bridge is working, I have a question because the only thing I do not know is how to measure this capacitor: cbb22 400v how to check if it is functional
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  • #9 16746278
    Krzysztof Kamienski
    Level 43  
    It is not even a converter, but an adaptation of the LED current by capacitive impedance at 50 Hz. The electrolytic capacitor appears bulged and therefore compact. Check this SMD fuse first.
  • #10 16746319
    marian1981.02
    Unitra equipment specialist  
    Krzysztof Kamienski wrote:
    The electrolytic capacitor looks bulged
    I wonder from which side? It is only crookedly soldered, but I am not saying that it is working.
  • #11 16746321
    mitlex
    Level 7  
    I suspect SMD resistors, one under the capacitor does not show value. Not even in the diode chart. The electrolytic capacitor is operational
  • #12 16746407
    cirrostrato
    Level 38  
    Once again I will give you a hint: a good source of obtaining damaged LEDs are containers for these spikes in supermarkets, of course you have to rummage 'unofficially' because protection chases seekers away, I recently pulled out three LEDs (E27 thread) each with one burned out of 48 LEDs (you can see visually burnt, all connected in series), shorted the defective and have been illuminating the driveway to the garage for a month. I will see how with the durability of such "repaired" ones, the biggest problem is cooling and the LEDs now work in a very cool (and winter is coming) environment.
  • #13 16746451
    mitlex
    Level 7  
    This is how I have repaired the LEDs more than once, but this time SMD resistors were sowing
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Topic summary

The discussion revolves around diagnosing and repairing a burnt 220-240V LED bulb. The user seeks advice on identifying burnt components using a universal meter and soldering tools. Responses suggest measuring the eight elements on the circuit board, focusing on the LED module, and checking the rectifier bridge and capacitors. Common failures include LEDs, electrolytic capacitors, and SMD resistors. Users share tips on measuring components and suggest sourcing replacement LEDs from discarded items. The importance of checking for bulged capacitors and SMD fuses is emphasized, along with practical repair experiences.
Summary generated by the language model.
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