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Class D Switching Power Amplifiers and Power D/A conversion

Tas 5630 Suddenly stopped
Tas 5630 Suddenly stopped
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Old 5th July 2019, 03:51 AM   #1
Snxone is offline Snxone
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Default Tas 5630 Suddenly stopped

Hello, i have a t5630 it stopped working like 1-2 years ago,
Only does were shutdown , after like 9 hours of continious music a 80-90 percent of the volume on jbl 250w rms/1000w max so i doubt the jbl killed him or if it would i guess it would kill 1 the the second channel not all the amplifier in one time
Im more sure for the power part with the lm317 and the tl2575, i also see one inductor wich could be wrong but as i cant test it for the moment i dont really know at the multimeter it look working but i dont know if it shorted so i need to wait for the lcr meter to test it

If someone know what it could be

Click the image to open in full size.

Thank you
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Old 5th July 2019, 05:40 AM   #2
chermann is offline chermann  Austria
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Hi

As you couldnīt see any smoke its a good chance that something "easy" is broken

are your speakers ok? or your soeaker coil is shorted? please check..
if you got your multimeter
-check if your outputs are shorted without spekaers and no power on the amp
- check if you get a short between the output terminals and GND or V+
- check visually all caps/ components
- dismount the heatsink (right side of the pic) --> visal check thsi chip

do not power on before you check the points above

chris
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Old 5th July 2019, 07:47 AM   #3
Snxone is offline Snxone
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Ok thank you but ever tryed to power afain but no result
Not even a circuit oline sign on my last try speaker was not even look like getting any power so might be the power, i was having a voltage drop if i remember good , also as it suddenly stopped without smoke for sure might be somethink on power line, i could guess the amp burn but both L and R amp in same time it look hard to imagine even if its possible.
As im not at home today i cant do more test now
For capacitor and all look ok at first view
Ill try to check voltage tomorow on power line
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Old 5th July 2019, 09:04 AM   #4
chermann is offline chermann  Austria
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Hi

so your impression is that your PSu is faulty?
nevertheless chekck with the DMM what happend at the PSU outputs.

this "inteligent chips" (TPA + TAS) could have many reasons they stop working or go into protection mode or mute. i personally do not know the TAS chips but its not a bad idea to go through the datasheet and "read/learn"

chris
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Old 5th July 2019, 09:34 AM   #5
Snxone is offline Snxone
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Yeah, thats also why i didnt investigate into it when it burned, the circuit were looking complex
Also i was having a fan soits not even overheated
The only eye seen problem is those 1MH inductor wich was moving but even buy solder it its still not good, may be it overheated and burned wrong value of the inductor and its not working but i dont really know atm
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Old 6th July 2019, 07:48 AM   #6
manojtm is offline manojtm  India
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Hi,

If your AUX supply (12v) fail 90% chance your TAS5630 will die
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Old 6th July 2019, 12:30 PM   #7
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Quote:
Originally Posted by manojtm View Post
Hi,

If your AUX supply (12v) fail 90% chance your TAS5630 will die
no, i didnt unput 12v, just the pc output so i guess 500mv to 2v probably but my volume at 90% of the potentiometer, what would be the use of inputing 12v in an amp , i guess it would even saturate at 5v
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Old 7th July 2019, 05:28 AM   #8
manojtm is offline manojtm  India
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Quote:
no, i didnt unput 12v, just the pc output so i guess 500mv to 2v probably but my volume at 90% of the potentiometer, what would be the use of inputing 12v in an amp , i guess it would even saturate at 5v
No, AUX means auxiliary supply (VDD +12v provided to TAS5630 PIN-64)

Regards
MANOJ
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Old 7th July 2019, 06:20 AM   #9
Snxone is offline Snxone
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Ha ok, no no they are a simple one input line of 50v, its an original part that i bought, i didnt made any change on it
Somethink like this buton ebay
Assembly Class D HIFI TAS5630 2.0 channel high power digital amplifier board 1200W-in Amplifier from Consumer Electronics on Aliexpress.com | Alibaba Group
I paid somethink like 60usd if i remember good, it was powered by a philips hifi power supply that was delivering 46-48v 6-7a arround so nothink that would push it at limit
So as it suddenly stopped without any smoke of bang sound, if i could repair it, it would be great and a worth repair board may be if its somethink on the power supply line
The lm317 worth somethink like 2 usd a lot of 5, the OPA1632DR worth 2 usd, the tl2575 7 usd for a 60 usd board if its repairable i would give a try if its not to much expensive, as the board wasnt too bad for my need it was doing the job,

Also i notice they are 2 amps on one power line

Thanks
Regards
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Old 7th July 2019, 08:53 AM   #10
manojtm is offline manojtm  India
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Quote:
auxiliary supply (VDD +12v provided to TAS5630 PIN-64)
TL2575HL used for this. (i think the coil bad)remove the coil and use drum coil 1mH or 500uH one with 2A capacity.

Regards
MANOJ
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