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Hello everyone.
Thank you all for your suggestions.
The loud speakers work just fine with my android cellphone (as headphone plugin for 3.5mm jack) and also with my laptop.
I am still waiting on the output side problem.
Regards
Dragon
Hello to all.
Mr. Brian I understood the the swapping issue you explained to me. Thank you very much for that. But if you look the picture I shared at the starting of this topic, both of my left and right loud speakers are attached to a single 3.5mm jack. And it should be attached to a single...
Hello and thank you Mr. Brian.
I also forgot to mention that the PSU capacitor is showing 16-17v reading.
About changing the sides, how am I supposed to do that? Could you please elaborate on that part?
Also, should I change the mini capacitors and resistors (if some of them have lower...
Update:
Things I have done so far:
1) Replaced IC#1 CD6282CS with new IC CD6282CS.
2) Put back IC#2 with old IC CHMC S2702 D6282. Because I ran out of new ICs'.
3) Still no sound output. No heat on any IC.
4) Here is the chart for output measured volt on each of the pins of each of the...
Just a quick question:
If I change the 3300uf 25v capacitor (current PSU capacitor) with a 2200uf 16v capacitor, will it work?
Also, I just found a somewhat specific CHMC production D6282 IC description with pinout. It is the same as IC CD6282CS. You can see here says, the same volt max output...
Hello to all.
And thank you all for your kind replies. I have some update and a hypothesis about the problem. I also attached link of some pictures if that might give a clear understanding.
1. I replaced both IC CD6282CS with the new ones. And still no audio output.
2. I checked with the...
Okay.
Let's start from 0 again. Can anyone please explain the power supply part here? I mean what is a power supply for an audio PCB stand for. What are the requirements to make one? What are the parts of this power supply?
With details, like images or video would be great.
Thanks for the...
Hello.
Update:
As ads-ee said that the IC may have been damaged, I quickly replaced the damaged IC with new ones. But still there are no audio output.
Now I am really going blank on this PCB design. I don't know what to do next.
Thanks for the help.
Dragon
Update:
Things I have tried so far:
1) I checked the IC getting hot and checkout the pins of the IC. And then I checked again with the datasheet and I came to conclusion that I misplaced the IC backwards. So, I desoldered the IC and changed the sides again.
2) I checked with voltage power...
I see, I found some Chinese documents on the circuit CD6282CS but not on my previous D6282. I am trying to translate the document now but still unsure about the comparison, whether that's the exact circuit replacement or not.
I am still searching for more documentation and highlights. Thanks...
Hello.
Thank you for all of your support and specific replies. I am attaching a block diagram of my own understanding of the PCB and I worked and learnt through so far.
After you check the diagram here
[found at: imgur. com /a /wxc4eVu]
I have already replaced some of the parts on the...
Hi again.
Posting in the same issue again. I just went through a lots of documentation and found multiple problems with one PCB. Like my my transistor was BR 9012 which blew up and I replaced it. Then I checked with the IC D6282 and replaced both circuits. Still there was no sound output So I...
Hello.
First of all thanks for the information sharing and suggesting. Both of my interchangeable speakers works 100% with my laptop and my cellphone.
So, coming to the important point. I figured that the entire board is dark and has no electricity supply. This made me focus on the Transistor...
Update:
After replacing the faulty capacitor, I used the tester screwdriver again to check if the buzzsound is produced somehow. But no sound is coming out now. Also, I remembered that the screwdriver lighten up before, I mean before the buzzsound issue. Any pins that I touched with the...
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