Burnt 85 Watt CCFL Bulb Repaired
A burnt 85 watt CCFL bulb was brought for repair. I opened the case cover, clean inside full of dust and dead tiny insects which have gotten inside for warmth purpose.
Then I tested all components on board and found 4 resistors opened,
2 transistors(13003) shorted, which I de-soldered out and replaced with new ones.
However, the 4 burnt resistors are 0.5W in size, but I replaced with 0.25W. Well, it may seem unprofessional.
I did this because I have repaired quite a number of this bulb of various brand and have always found 0.25W on their boards. Why the maker of this particular brand use 0.5W remains unknown to me.
This article was prepared for you by Imoudu Onwumah from Nigeria. He is 62 years old and has just 3 years experience in electronics repairs. I started career in hotel industry as a chef, but then I was doing repairs only in electrical repairs as a hobbyist. In 2018, I decided to learn about electronics which through Jestine’s electronics e-books and holding my hand, am an electronics techie today.
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Note: You can read his previous article on Lead-Acid Battery Powered Table Lamp Modified To Use Lithium-ion Battery