Repaired LED Bulb By Upgrading To DOB
I found LED Bulb in my storage area was blinking. So, for inspection I put the bulb on my workbench. Removed top Diffuser plastic dome & found LED Circuit was totally degraded.
This Bulb is rated 7W, nothing can be done on this PCB. Last time I ordered few DOB with some other materials I know this Bulbs are non-predictable infact some are working fine since last 5 years even more without any problem.
DOB – (Driver On Board) this PCB does not required any extra Driver circuit because it has circuit on the PCB itself.
For installation I removed bulb’s PCB holding plat
which also works as heatsink & also removed Driver circuit.
After removing the PCB, I applied Thermal paste under the DOB Plate, Solder wires directly from PCB to Bulb Conductive caps & bulb is ready to test.
Assembled the bulb & it is shining on its place.
This article was prepared for you by Yogesh Panchal who works as a Computer Hardware Engineer in Mumbai India.
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Note: You can check his previous repair articles on Buildskil Cordless Drill Machine Adapter Repaired
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Waleed Rishmawi
December 14, 2024 at 4:58 pm
perfect fit of boards and it actually looks way much better than the original one. good job and keep up the good work. have a blessed day
Yogesh Panchal
December 17, 2024 at 1:21 am
Thanks! Waleed
Anthony Paterson
December 21, 2024 at 2:56 am
Yogesh,
I was unaware of DOB modules. I have now placed an order on AliExpress so I can carry out similar repairs. I imagine effective thermal dissipation will be necessary for a long service life. Grateful thanks for your article.
Albert van Bemmelen
December 14, 2024 at 5:14 pm
Very interesting replacement job Yogesh!
Those new DOB plates are a good method to fix any defect light bulb and I noticed that they are easily available on Aliexpress in sets of 10 plates in also different Wattages.
Yogesh Panchal
December 17, 2024 at 1:22 am
You are right Albert,
Good idea to buy it in bulk if you have more bulb in use.
corriette
December 14, 2024 at 6:38 pm
great accomplishment.
Yogesh Panchal
December 17, 2024 at 1:23 am
Thank you!corriette
Mark
December 14, 2024 at 9:38 pm
I didn't know you could buy them as a separate unit. I've learned something new today
Yogesh Panchal
December 17, 2024 at 1:25 am
Mark,
Circuits are easily available.
Parasuraman S
December 14, 2024 at 11:33 pm
Excellent descriptive article step by step! Very useful! Thanks for sharing, dear Yogesh Bai!
Yogesh Panchal
December 17, 2024 at 1:25 am
Thank You! Sir
Eric Rice
December 15, 2024 at 1:09 am
You’ll probably think this stupid, but how did you get the difuz
Yogesh Panchal
December 17, 2024 at 1:29 am
Eric Rice,
Some diffuser are easy to remove just twist the dome & it will come out some are pasted with Glue, just apply Petrol on Joint line keep a side for 5 minute & you can pull out the dome easily.
Eric Rice
December 15, 2024 at 1:11 am
How did you get the diffuser off?
Thanks,
Eric
Mark J
December 15, 2024 at 4:33 am
Yogesh well done...
Yogesh Panchal
December 17, 2024 at 1:30 am
Thanks! Mark J
Imoudu.O
December 16, 2024 at 4:46 am
I don't know if that dob actually last as i have seen those things on my bench before.Driver ic is always the problem.
Yogesh Panchal
December 17, 2024 at 1:31 am
Imoudu.O,
Rarely find Bad Driver IC, Mostly LED's are going bad /Burn.
mervin
December 18, 2024 at 11:06 pm
Nice to see step by step repair
Yogesh Panchal
December 20, 2024 at 2:59 pm
Thank you! Mervin,