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      Tokyoskies replied to the thread KEF LSX Teardown and Repair.
      Its a fair argument. I have worked with a lot of active monitors, but they were either high quality or inexpensive. My Dynaudio Air...
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      Tokyoskies replied to the thread KEF LSX Teardown and Repair.
      I have the KEF LSX, LS50 Wireless and two sets X300A and all of them had issues. Luckily so far I could fix them and they play well. My...
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      Tokyoskies replied to the thread KEF LSX Teardown and Repair.
      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.
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      Tokyoskies replied to the thread KEF LSX Teardown and Repair.
      Did you verify R411? That resistor is essential for Z203 to receive the correct voltage. Yes, if the issue is thermal, it makes sense...
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      Tokyoskies replied to the thread KEF LSX Teardown and Repair.
      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...
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      Tokyoskies replied to the thread KEF LSX Teardown and Repair.
      Hmmm, this all points toward a thermal issue coming from Q211, as you suspected in the beginning. I think KEF works in very tight...
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      Tokyoskies replied to the thread KEF LSX Teardown and Repair.
      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...
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      Tokyoskies replied to the thread KEF LSX Teardown and Repair.
      Your English is fine. Where do you live? Definitely sounds like a thermal issue, although those BCP56-10 can tolerate higher...
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      Tokyoskies replied to the thread KEF LSX Teardown and Repair.
      Thats awesome news. Well done. I also have resolved the issue and the speakers work really well again. After replacing D205 and D207...
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      Tokyoskies replied to the thread KEF LSX Teardown and Repair.
      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...
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      Tokyoskies replied to the thread KEF LSX Teardown and Repair.
      Funny how I missed the schematics posted here earlier. Makes all much clearer and also aligns with my findings described above. So, 30V...
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      Tokyoskies replied to the thread KEF LSX Teardown and Repair.
      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...
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      Tokyoskies replied to the thread KEF LSX Teardown and Repair.
      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...
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      Tokyoskies replied to the thread KEF LSX Teardown and Repair.
      Thanks for your answer. Here in Germany we have an expression „kaputt repariert“. Easy to understand, I guess..haha. Anyway, from the...
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      Tokyoskies replied to the thread KEF LSX Teardown and Repair.
      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...
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