Last week I disassembled two failed LED lights in order to inspect the faults and maybe try to repair them.
The first had a simple issue with broken solder connections so that was an easy fix, but the other one had a burnt LED chip that was in series with the rest of the lamp.
Since these LEDs have multiple chips inside, it is very difficult to find an exact replacement unless you have several broken ones so you can swap from one to the other.
Being intrigued by the circuit, I found the datasheet for the chip used in it, MC5833B, and I found out that the chip is a step-down, constant current LED driver. What that meant, is that no matter how many LEDs there are on the output (in the allowed chip range), it will try and push the specified current through them.
So, armed with this new knowledge, I removed the old LED and I just bridged it across with solder so I can get rid of the break in the circuit that the burnt LED caused.
If you want to know what happened next and if that fixed my LED bulb, be sure to watch the video below!
Tools and materials used in the video:
- Soldering kit - https://s.click.aliexpress.com/e/_AA4UH5
- Screwdriver set - https://s.click.aliexpress.com/e/_9A0yRZ
- Digital multimeter - https://s.click.aliexpress.com/e/_AC0sc3
- Mini handheld microscope - https://s.click.aliexpress.com/e/_AB3YIn
- Wire quick connectors - https://s.click.aliexpress.com/e/_AqBf5h
Alternative links on Banggood:
- Soldering kit - https://www.banggood.com/custlink/3GDyZCAsvP
- Screwdriver set - https://www.banggood.com/custlink/v33dIJAA3B
- Digital multimeter - https://www.banggood.com/custlink/vGDR9WsbEy
- Mini handheld microscope - https://www.banggood.com/custlink/KmKY8cnNEr
- Wire quick connectors - https://www.banggood.com/custlink/KmDEZcssYV