Repairing Portable Stereo Speakers

[Waqar]

Hello!

I'm trying to repair portable speakers, so the problem is there is an 16 pin IC which is scratched from the top by manufacturer
Can someone one please guide me how to configure this out. I wanna replace this IC but how ? (I'm unable to read IC number).
Product info: Unfortunately there is no much information
Portable Stereo Speakers, 130 MW,  albestech (written on pcb ), local brand.

[David_AVD]

How did you find that the IC is faulty?

[Waqar]

i took it to repairing shop there technician told me that  

[tautech]

Without knowledge of the chip, I would Google for "16 pin DIP Stereo Amp IC".
Explore results, download datasheets and compare the datasheet "Typical application" examples to the PCB you have.
You may have to "reverse engineer" the PCB.
You could well strike it lucky.

[David_AVD]

TEA2025

[tautech]

TEA2025

[David_AVD]

http://au.element14.com/stmicroelectronics/tea2025b/ic-audio-amp-4-7w-pdip-16/dp/2112566

[Waqar]

Without knowledge of the chip, I would Google for "16 pin DIP Stereo Amp IC".
Explore results, download datasheets and compare the datasheet "Typical application" examples to the PCB you have.
You may have to "reverse engineer" the PCB.
You could well strike it lucky.

Thanks for your attention.
I already Google it and i found only one IC on Google results that is MAX9722.
Now the thing which is confusing me is that in the datasheet of MAX9722 those pins which it declare for output, one of them is grounded on the pcb which i have.
so now i'm bit scared whether i should try this IC or not because it can ruin my rest of pcb
and how can i 'reverse engineer' btw.

[Waqar]

TEA2025

OMG you are genius man!
THANKS alot   
i think your guess is right because when i compared grounded pins and output pins. These were exactly same as the datasheet is showing.
now i'm going to try this IC with confidence 

Now i'm wondering how did you find that. Can you share your technique please? 

[tautech]

TEA2025

OMG you are genius man!
THANKS alot   
i think your guess is right because when i compared grounded pins and output pins. These were exactly same as the datasheet is showing.
now i'm going to try this IC with confidence 

Now i'm wondering how did you find that. Can you share your technique please? 

Super Contributor you know....like Superman. 

[David_AVD]

Went to Digikey product index
Selected Linear - Audio Amplifiers
Filtered by 16 pin DIP package
Filtered for stereo chips
Filtered for ones that work on more than 5V (input DC went via switch then to IC, not via the 7805)
Downloaded each data sheet one by one and looked for GND on 3,4,12,13 and V+ on 16.
Only one possibility left
Checked where the input and output pins went to see if that made sense with PCB
Posted here

Yes, I have been servicing audio gear for about 35 years. 

[Waqar]

Went to Digikey product index
Selected Linear - Audio Amplifiers
Filtered by 16 pin DIP package
Filtered for stereo chips
Filtered for ones that work on more than 5V (input DC went via switch then to IC, not via the 7805)
Downloaded each data sheet one by one and looked for GND on 3,4,12,13 and V+ on 16.
Only one possibility left
Checked where the input and output pins went to see if that made sense with PCB
Posted here

Yes, I have been servicing audio gear for about 35 years. 

Thats Great
Thanks man
and Yes tautech you are right. He is Superman (atleast for me )