Tokyoskies

If you think that Q211 runs far too hot, you could try a heatsink on it. Just a small one, like the ones I use in my Raspberry Pi.

Did you verify R411? That resistor is essential for Z203 to receive the correct voltage. Yes, if the issue is thermal, it makes sense...

In my case, I replaced Z203 since it was shorted anyway (it was beeping in continuity on my multimeter). I did not have 22V, so I...

Hmmm, this all points toward a thermal issue coming from Q211, as you suspected in the beginning. I think KEF works in very tight...

22V output from Z203 is correct. Can you check that Z203 is ok? It does look a bit weird. Not sure about that dark spot, as it doesn’t...

Your English is fine. Where do you live? Definitely sounds like a thermal issue, although those BCP56-10 can tolerate higher...

Thats awesome news. Well done. I also have resolved the issue and the speakers work really well again. After replacing D205 and D207...

Thats really sad to hear. You will find the schematics on page 2. From what I saw around the next, most issues came from L236 and the...

Funny how I missed the schematics posted here earlier. Makes all much clearer and also aligns with my findings described above. So, 30V...

So I have spent the evening rebuilding that entire corner. I have taken my time and great care, working mostly with hot air. I also...

Thank you for the advice. I just checked the traces and they do seem fine. I also traced the current path to go to the DSP from L236. I...

Thanks for your answer. Here in Germany we have an expression „kaputt repariert“. Easy to understand, I guess..haha. Anyway, from the...

So I took the chance and put a 39V zener diode in and the short in Z203 and C435 is gone. I also replaced C435 just to be sure. The...

I think I found the issue. As soon as I removed the zener diode, the short on C435 disappeared. Might be that I used too low value diode...

I followed your advice and measured the voltage at the speaker output. Right after switching on the voltage jumps to 12.2V and...