Hi,
I'm from India, and a complete newbie
Reading a lot of good reviews of the TPA3116 YJ blue board I ordered one from AliExpress. It came with just the board, no interconnect cables or whatever. I didn't find any female version of that 3-pin signal input in the local market. All I got is a 3-pin relimate connector which is slightly different from what the board has. So I first tried with direct soldering three wires from the pins, it worked. I hooked it with a pair of Cambridge Audio SX50 and I was just blown away by the sound quality! But the wires were coming out, so I though I would remove the 3-pin connector from the board and replace it with the relimate connector I got.
Well, I did that and it was one of the biggest mistakes of my life! 🙁 I tried to put the relimate connector with a low watt solder, the soldering was not good. When I connected with the speaker I only got some hiss/buzz (not loud, but louder than "normal"), no audio. Then I found that the relimate connector I soldered was a bit loose - when I tilted it a bit then suddenly the audio came, but only in one of the speakers. Then I tried to resolder the connector, and finally I got some patterned pop sound - like: pop...pop...pop.....bheep!!! No audio. Then I tried to directly solder the wires coming from rca input to the Rin-Ground_Lin, and finally it was completely silent...I mean it's probably died on me. There is absolutely nothing coming out the amp now
Multimeter only reads a 20V at the Vcc-Ground input (I'm applying a 19V, 4.74A power adapter), everywhere else it shows zero!!!
Please someone help me, please!!!
I'm from India, and a complete newbie
Reading a lot of good reviews of the TPA3116 YJ blue board I ordered one from AliExpress. It came with just the board, no interconnect cables or whatever. I didn't find any female version of that 3-pin signal input in the local market. All I got is a 3-pin relimate connector which is slightly different from what the board has. So I first tried with direct soldering three wires from the pins, it worked. I hooked it with a pair of Cambridge Audio SX50 and I was just blown away by the sound quality! But the wires were coming out, so I though I would remove the 3-pin connector from the board and replace it with the relimate connector I got.Well, I did that and it was one of the biggest mistakes of my life! 🙁 I tried to put the relimate connector with a low watt solder, the soldering was not good. When I connected with the speaker I only got some hiss/buzz (not loud, but louder than "normal"), no audio. Then I found that the relimate connector I soldered was a bit loose - when I tilted it a bit then suddenly the audio came, but only in one of the speakers. Then I tried to resolder the connector, and finally I got some patterned pop sound - like: pop...pop...pop.....bheep!!! No audio. Then I tried to directly solder the wires coming from rca input to the Rin-Ground_Lin, and finally it was completely silent...I mean it's probably died on me. There is absolutely nothing coming out the amp now
Multimeter only reads a 20V at the Vcc-Ground input (I'm applying a 19V, 4.74A power adapter), everywhere else it shows zero!!!Please someone help me, please!!!
So, the chip is fried then! But I don't understand several things. First of all, the input connector is quite far away from the chip, how a couple of soldering works can damage the chip! Secondly, this board is famous with various mods diy gurus have invented 🙂 Replacing the connector should be the most trivial (not for me of course 🙁 ) mod! Could this be due to anything else that can be fixed?
Anyway, thanks a lot for your suggestion 🙂
Please check the voltage across the bootstrap/chargepump caps at the output. Should read something about 6.2V.
Okay, right now I don't have the board with me. I'll report about this as soon as I go home tomorrow and have the board. Thanks a ton!!
One silly question: should I check this with the rca input connected to the input terminals or it doesn't matter?
Unless you mess around with other part of the board, it is unlikely that you fried the chip as there is a coupling capacitor on each input before the signal goes to the chip. Can you try soldering input wires directly to the coupling capacitor?
That's a really good suggestion
I'm quite sure I didn't touch the soldering iron to any other place. I'll try to post a picture of the board tomorrow. And definitely try your suggestion. Thanks so much!I'm getting +5.0V across one pair and -5.0 across another pair of the bootstrap capacitors. Input voltage is 20V. Is it normal?doctormord said:
I've tried your suggestion, but no luck 🙁 The board is absolutely silent. Somehow there is nothing at the output!
I used to be really hard on myself when I would be attempting to mod and subsequently "ruin" or damage a pre-built board. Now, if it happens, I try to think about the costs of other hobbies where one may lose money. Don't beat yourself up, it happens.
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