LED Light Bulb Teardown

Escrito Por: Wieli
Publicado em: 18/02/23
  • Comentários: 7

LED Light Bulb Teardown

Publicado em: 18/02/23

Teardown

Introdução

Teardown of a standard LED light bulb

Ferramentas

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    • Carefully cut and pry with razor blades between the diffuser and body of light bulb.

    • Diffuser is sealed onto body of bulb.

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    • 15 LEDs spread in ring.

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    • Filing into the side of the bulb.

    • Top layer is circuit board.

    • V-shaped metal is casing about 1mm thick.

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    • With open gap circuit board can be removed.

    • Attached with wire and resistor to base of bulb.

    • Release clips to release wires.

    Bulb not working

    Shrishant Fadatare -

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    • Capacitor is removed as previous wires in Step 4 were removed.

    • Capacitor is 10 mircoFarads.

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    • Resistor removed by popping of bottom cap.

    • Resistor is 4.7 ohms.

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    • Parts laid out and details.

Autor(a)

Wieli

Membro desde: 09/01/23

2171 Reputação

6 comentários

I'm curious, if anyone has taken apart enough failed LED light bulbs to discover if there is a trend in what part fails first. This would be interesting if it is a component that can potentially be replaced. A buck or less to get more life out of a $10 bulb seems like a good trade off!

jaeckerb -

I've wondered the same thing myself. It seems likely that it would be a failing capacitor or possibly one of the LED's in a series circuit, where if one fails they all go off or flash as the failing LED works, heats up, fails, cools down, works again, and repeat) as often failed LED bulbs do.

Mike Klingler -

Diode usually. you can take your meter and on both sides of each diode test each individually when it lights up u know that one is bad. pop bad led off with pick and take lead out of graphite pencil shaving on circuitry and/or. little drop of super glue to allow it to bond and test again light should be fixed.... easier done then explained lol.... god bless.

CryptoCros -

I don't understand

Shimelis -

Please in video

Shimelis -

The board contains two surface mount IC's ; a CD MB6F bridge rectifier ( 4 pin ) and a OF66R 9204ES10 LED driver ( 8 pin ), 8 LED's , a 200v/10uF electrolytic capacitor, two 2K ohm resistors connected in parallel ( effective resistance of 1K ), a 30K ohm resistor connected across the capacitor and a 4.7K ( 1/4watt ) resistor connected in series with the line voltage ( hot wire ). The neutral wire is connected to the threaded part of the light bulb socket , the 4.7K resistor is connected to the tip of the socket.

lawrence fillier -