Burnt SMD 8002A Sound IC
A customer of mine sent to me a device for repair that can support MP3, Radio and USB. The complaint was no sound but have power. Sound issues usually is related to bad speaker, speaker wires came off, improper or missing DC supply voltage to sound IC (audio amplifier IC), bad sound IC, dry joints, broken circuit track and etc.
The first thing I did was to open up the cover and check for any broken connection (yellow arrow in the 2nd photo below) between the speaker and the mainboard. I also checked on the speaker and all seems to be working fine.
When I had a closer look at all the components on the circuit board, I found that the sound SMD IC 8002A was actually bulged and slightly burnt-see the photo below:
I got new IC in my spare parts compartment and directly placed it on the board and do some rework.
It was an easy job with the use of a SMD rework station. You can actually click on this 8002A SMD IC link to access the IC info.
Once the replacement of new IC was done and powered On, the sound came back to life.
Conclusion- Obviously you don’t just direct replace the IC and straight away retest the device, you got to check on all the corresponding components first to made sure they are all good. If you do not know how to check the components, you can get Jestine Yong’s ebook here. Ok, will see you again in the next repair article!
This article was prepared for you by Suranga Bandara who owns an Electronics repair shop in Anuradapura, Sri Lanka.
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Note: You may check out his previous post about No Power in Haier 32 Inch LED TV .
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Albert van Bemmelen
May 28, 2021 at 5:45 pm
Thanks for the info on the sop8 amplifier!
Parasuraman S
May 28, 2021 at 8:32 pm
A good fix there, Suranga! Thanks for sharing!
Christopher Massie
May 29, 2021 at 10:04 am
Nice to have an easy one once in a while Surang! Great job as usual.
Thanks for the info on the Op amp.
kelvin togaraseyi
May 30, 2021 at 5:00 pm
Thanks Jestine. Would not want to miss any of your articles
Jestine Yong
June 1, 2021 at 10:32 am
Hi Kelvin,
You are welcome. I have to thank the authors for the contribution of their articles.
Jestine
Yogesh Panchal
June 6, 2021 at 11:07 pm
Good Job!Suranga
Mwesigwa Eria
August 5, 2021 at 8:38 pm
Thanks very much sir for this presentation, but how can I get to know that it's faulty when not burnt physically?