Question about Alesis Fusion 8HD Sound Card

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No sound When i turn on my fusion HD8 the volume knob doesn't work -just rotate- and the sound from the keyboard is very weak and you can hardly hear it coming out along with a little buzzz from my monitors. I check the headphones ,aux jacks and main outputs but still the sound is so low with something like static elecrticity sound coming out from the monitors. Monitors are ok , i checked them with another instument. I also did the rebbot and reinstall the OS bin file but still the same. Probably is a internal out problem, what you thing? Please help!

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  • lgeroulias Sep 16, 2008

    Can you post it in English please ?

  • Anonymous Nov 11, 2008

    انا عندى مشكلة في تعريف كارت الصوت في نسخة الويندوز اكس بي بونتو

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I had that on my HD8. I had the extremely faint sound problem, too. Volume did nothing.

In my case it was the I/O card (part number AL9-79-0313-A), which feeds the headphones and other outputs. At one time the card was about 115 dollars, I think. You can call Alesis parts and try to get one. Be aware, though, that it is possible something else popped this board, as some Fusions had a power regulation issue in the past (I wish I could advise you specifically on that, but I can't find out the details myself.) So far, mine is working wonderfully.

(Actually, on my I/O card it was one blown transistor and a fried quad op amp. The transistor applies or removes voltage to the output op amps as told by the MUTE signal, which I suppose is to keep your speakers and ears from popping when you turn the Fusion on. That made it like MUTE was on all the time, with the smallest amount of leakage if you listen really close in headphones.


I got it going because I have done electronic repair work for years AND because Alesis was kind enough to send me a PDF of their service manual. And God helped me, or at least kept me from ruining it further by giving me some patience. No parts looked bad that actually were bad on the IO card. I felt fortunate to get it working this way, as the surface mount parts are tiny, and it's been awhile since I did much electronics.

If you do take this dude apart, be very careful not to pinch the large gray ribbon cable (looks like a hard drive cable) in the back of the keyboard putting it together again. Don't ask how I know that...

Posted on Nov 18, 2008

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مرحبا لدي مشكلة في تعريف كرت الصوت برجاء مساعدتي في حل هذة المشكلة لانة ليس لدي سيدي لتعريفه وشكرا

Posted on Sep 15, 2008

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