SJ2822M IC Fault
Recently I decided to buy new speakers for my laptop. They have much better sound and uses USB port to connect to the laptop. The old ones that I have, can be powered on but there was no sound. Today, I decided to get them fixed because a friend of mine was in need of speakers and I was willing to get them fixed and offer them as a gift.
They used to have good sound and I had them for almost five years till they stopped producing sound.
Since there was no sound and I have power, I headed directly to the sound IC and I was almost sure that it was the main problem.
To get inside the speakers, I had to take the speaker face off to get to the screws.
Two screws on the bottom and two screws on top. Once the screws were off, I could see inside the speakers.
As you cans see the speaker board inside; my thoughts were focused on the amp IC on that board. The part number is SJ2822M9 and the datasheet:
I did not even bother checking voltages on it, because I was more than sure that the problem lays in that bad chip.
Once it was taken off board and found out the part number, I found exactly like it in my shop.
As you can see, the IC was off and once I made sure that the board was clean, I installed the old replacement on that board.
I put everything back together and I hocked up my speakers to my laptop and as expected, the sound was back and it was good.
I called the guy and he came and got his speakers; he was happy. It is not always about money and income but it is about putting a smile on someones face. Mission Accomplished.
This article was prepared for you by Waleed Rishmawi, one of our ‘Master Authors’ and currently working in the Bethlehem area of Palestine repairing electrical and electronic equipment.
P.S- Do you know of any your friends who would benefit from this content that you are reading now? If so, forward this website to your friends or you can invite your friends to subscribe to my newsletter for free in this Link.
Note: You can check his previous repair articles in the link below:
https://www.electronicsrepairfaq.com/no-disc-in-cd-player-repaired-model-panasonic-as-ak18
About admin
Jestine Yong works as an Electronics Repair Lecturer in Kuala Lumpur Malaysia and his training website is http://www.NoahtechElectronicsTraining.com. You can check out his repair blog at http://www.JestineYong.com
20 comments on “SJ2822M IC Fault”
Leave a Reply
Leave a Reply
This site uses Akismet to reduce spam. Learn how your comment data is processed.
Fine tecnical articles.
Finn: thank. have a good day
Rock On Man” :[)
James: thanks man
Good job. Ten of those probably equally TDA 2822 dual amplifier ICs only cost $0.99 free shipping on eBay. Which makes it an interesting little chip to use in other audio projects!
Albert: thanks. yes they are very cheap but it takes a long time to get. here I have it in my shop or buy them from the store near by
You had the datasheet. Why not spend a few more minutes to show proper troubleshooting methods? Very easy to check voltage, which should always be the first step.
Ernie: usually it is the first step to do and I know it is very easy to check voltages but in this case I know exactly what the fault was why waste time.
Well said! It’s not always money that matters. It’s the human value and the relationship! Excellent!
Parasuraman: very true. thanks and have a blessed day
I agree !
John: noted and thanks
Good Job! Waleed
Yogesh: thanks and many blessings to you
Very Very good job done.
Congratulations.
Harden: thanks
Haren: thanks. have a super day
I thought that you would have first checked the capacitors for leakage. However, after giving it some thoughts I can certainly understand why the capacitors were ignored. A leaky capacitor and or leaky capacitors would not killed the sound all together. There would still be sound, perhaps raspy, muffled or garbled. Good job. Thanks for sharing.
Devon: exactly.
Devon: you are most welcome. thanks for sharing