Fault lamp turn off when i connect speaker into R channel output and turn up input pot to about 12’oclock, then board turn off completly. L channel doesn’t get this issue
You might want to avoid having naked boards powered on metalized film bags. You are possibly shorting out/cross conducting pins on the board (depending on bag make/quality).
Será que isso é um defeito mesmo? Na minha placa de tpa3255, eu apliquei muito sinal na entrada de áudio, a luz de clip acionou, mas logo em seguida, o amplificador começou a cortar, mas eu baixei um pouco e ele retornou com o som.
Can you check the dc offset on the output of the bad channel? Measure across the terminals and from each terminal to ground and compare with the other channel.
@@daifanshi5564 i found where is problem here, the thermal pad can not transfer the heat quickly to heatsink, so OTE shut down the chip, maybe AB channel nearly the sensor. I removed it, connect direct the heatsink to chip surface and now it could handle better Thank for you help!
check the soldering quality. the elements on this board are poorly soldered. you are not the first to have problems with this board. I had one resistor in the gap, and the clipping indicator was blinking too
@@trungqn1890 very bad soldering, I checked it with a tester, the resistor 12 in the first branch of the 3.3 Ohm chip was in a break, after that I just soldered suspicious places on the entire board
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You might want to avoid having naked boards powered on metalized film bags. You are possibly shorting out/cross conducting pins on the board (depending on bag make/quality).
Thanks for reminding me, I know and have carefully checked these bags, they are 100% insulated
Será que isso é um defeito mesmo? Na minha placa de tpa3255, eu apliquei muito sinal na entrada de áudio, a luz de clip acionou, mas logo em seguida, o amplificador começou a cortar, mas eu baixei um pouco e ele retornou com o som.
Check Audio input socket .
Short left and right input
irrelevant bro
Bro it mostly happens when u dont match the speaker impedance ohm range, make input/output positive negative or L/R connection wrong.
Nope, this board has problem with the heatsink. Remove the ceramic thermal pad and mod a little would fix it
Isso é o CI entrando em modo proteção para evitar queimar, eles tem essa proteção para pessoas que nao sabem configurar som queimar eles.
Who meny Volt's they work ? And who many Amps?
48v 10amp
Are you driving this from a low impedance source? i.e., a power amplifier?
no, im using source from a DAC. I have another aiyima a07 and it has not any problem
Can you check the dc offset on the output of the bad channel? Measure across the terminals and from each terminal to ground and compare with the other channel.
@@daifanshi5564 DC offset: bad 7mV, good 15mV
terminal to GND: N bad: 13.73V P bad 13.73V
N good: 13.69V P good: 13.71
@@trungqn1890 Doesn't look like excess DC offset. Unfortunately, I can't really debug the circuit remotely. Sorry.
@@daifanshi5564 i found where is problem here, the thermal pad can not transfer the heat quickly to heatsink, so OTE shut down the chip, maybe AB channel nearly the sensor. I removed it, connect direct the heatsink to chip surface and now it could handle better
Thank for you help!
Con này chất lượng ổn ko bạn, mình có cặp thùng 3 đường tiếng của dàn dvd lg mỗi bên 180w định mua mạch này chạy với sạc laptop 19.5v 15A
chất âm thì ok bác, mà nó đang có vấn đề 1 kênh
@@trungqn1890 mình thấy hình như lỗ cắm bị lỏng hay mối hàn bị gì thì phải, chạm vào ốc thì hát mà siết dây vô trong không hát phải ko
@@leminh094 bác nhìn nó có 2 đèn, đó là đèn fault và đèn clipping. Ở đây nó bị tắt đèn fault khi mở to kênh R, đèn tắt và mạch cũng ngắt tiếng
U need more than 19volt
The Quality is good if have more than 36volt
@@dennissinger7880 im using 38v 12a
Làm sao để đánh mono bạn 😂
Làm theo datasheet thôi bạn 😂
Con này phải can thiệp vào ic mới về mono đc ah b,kp phải cầu 2 đường tín hiệu ra loa là nó về mono ah,mong b chỉ thêm giúp vì khúc này chưa hiểu lắm
For class D modules.thermal heatsink is very important. It always easy to adds.on thermal paste.before ising it.thanks
replace opamps
irrelevant
check the soldering quality. the elements on this board are poorly soldered. you are not the first to have problems with this board. I had one resistor in the gap, and the clipping indicator was blinking too
How did you fix it? where is the resitor, does it connect directo amplifier chip? I checked the R OC resistor but it is normal
@@trungqn1890 very bad soldering, I checked it with a tester, the resistor 12 in the first branch of the 3.3 Ohm chip was in a break, after that I just soldered suspicious places on the entire board
@@Super_Amp thank u so much. I will resolder all
@@Super_Amp i soldered all parts around amp chip but problem still here
@@trungqn1890 you can try to move and press your finger on the operational amplifier. I saw on the Internet that the seat is weakened.
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