Comments on: CFL Bulb Repair

By: Goutam Praharaj

Goutam Praharaj — Thu, 04 Aug 2016 12:36:20 +0000

What is the specification of F1

Likes(0)Dislikes(0)

By: MOHAMMED ZAHOOR KHAN

MOHAMMED ZAHOOR KHAN — Thu, 07 May 2015 12:05:30 +0000

VERY GOOD AND VERY EASY TO UNDERSTAND THANKS

Likes(0)Dislikes(0)

By: Pete Singh

Pete Singh — Wed, 11 Mar 2015 13:03:59 +0000

Yogesh you the man dude keep up the good work sharing your knowledge with others is the best experience .

Likes(0)Dislikes(0)

By: Vasile Petrica

Vasile Petrica — Sun, 01 Mar 2015 19:05:06 +0000

I apreciated your article!Bravo,bravo.

Likes(0)Dislikes(0)

By: Marijus Brikas

Marijus Brikas — Sun, 01 Mar 2015 17:01:44 +0000

In most cases You do not need to check capacitor directly.
first, if the circuit looks good (fuse can be blown), there is a need to check bulb filaments. Both should have resistance of about 10 ohm or similar. If everythong is ok, the only bad component remains capacitor.
Sometimes short capacitor can not be found using simple multimeter (as measuring voltage is in the range of few hundreds milivolts), so insulation meter can be used, or any other continuity circuit, with voktage of few tenths of volt.

Likes(0)Dislikes(0)

By: Yogesh Panchal

Yogesh Panchal — Sun, 01 Mar 2015 14:01:23 +0000

Dear all ,

Thanks for your comments and suggestions,I have already mentioned in this article about i have found this capacitor shorted while tested with multimeter and also i have mentioned i have checked directly this capacitor as per my previous experience.(i Have tested each components out of the PCB on my first experience because that time i am not aware of circuit diagram of cfl)this is common problem in this type of symptom in CFL Bulbs.
Any way the process of fault finding: The bulb working half of the way that means lack of voltage to CFL filament; now desolder the filament from the PCB Test the filament resistance anything between 10 to 200 Ohm if OK that menace CFL filament is working fine, also check the tube for physically damage.(the Best way to test the CFL Tube is replace it with working CFL if you have one in your junk box) now test the component one by one reverse way on PCB from filament and find the culprit.

Likes(2)Dislikes(0)

By: Robert Calk

Robert Calk — Sun, 01 Mar 2015 13:56:15 +0000

In reply to Abdul Haleem.

I was just wondering why he didn't have a picture with the cap on the meter showing that it was shorted. If it were my article, there would be a picture so everybody could see the cap was indeed shorted. I believe that the reason is because it was just a bad solder joint and not a bad cap.

Likes(1)Dislikes(0)

By: Augis

Augis — Sun, 01 Mar 2015 05:13:55 +0000

The lamp symbol in schematics is wrong - where are the filaments you are talking about?

Likes(0)Dislikes(0)

By: Ehsan Murad

Ehsan Murad — Sun, 01 Mar 2015 03:45:54 +0000

Thanks you Yogesh.I would also like to know how you came to know capacitor is shorted.

Likes(0)Dislikes(0)

By: Gary Gemmell

Gary Gemmell — Sun, 01 Mar 2015 02:20:12 +0000

Great idea i always strip old pcb's for parts and store them and they always come in handy eventually.

Pity we live in a throwaway society where even a bulb like that is thrown in the bin. Well done Yogi!!!
>;o)

Likes(0)Dislikes(0)