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Class D Switching Power Amplifiers and Power D/A conversion

brx2400.1d blown
brx2400.1d blown
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Old 21st March 2015, 07:27 PM   #1
jo282 is offline jo282  Canada
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Default brx2400.1d blown

Hi, my hifonics brx2400.1d blown yesterday

I opened it up and 4 fets blown and a couple resistor near them burned. I do have soldering skill to change these no problem, but before I try I'd like to know what you guys think...

Would it work? And what else should I be looking for on the board?

Nothing else LOOKS burned or damaged, and I have a multimeter to check some components

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Last edited by jo282; 21st March 2015 at 07:45 PM.
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Old 21st March 2015, 10:19 PM   #2
nigelwright7557 is offline nigelwright7557  United Kingdom
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Location: Carlisle, England
You need to find out why they blew.
Simply replacing them might see them blow again straight away.
You could put a mains lamp in series with the amp before powering it up again.
Murton-Pike Systems PCBCAD51 pcb design software. http://www.murtonpikesystems.co.uk
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Old 21st March 2015, 11:09 PM   #3
jo282 is offline jo282  Canada
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I had just installed 0 gauge wires from the old 4 gauge I was using. I suspect my voltage was too low. Could low voltage cause the fets to blow?

Anyway the day went by and I think I will just buy a better amp.

I don't want to speed any more money on a ******** burnt amp, my mtx 650 blew 2 months ago on the input IC because of a cheap line-out converter and now this one blew. So I want an amp that will last me longer.

Should I get the Crescendo BC2000D or is there something better for 500?
And how many battery and what brand should I get? (stock alt)
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Old 23rd March 2015, 12:00 PM   #4
tufata is offline tufata
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Join Date: Mar 2015
Check and drivers before them located in Vergata of izgorleite resistors. If everything is OK, replace rezitorite and Mosfet. Submit the amplification and in ammeter. Current of +12 volts at rest should not exceed 1.5-2!
If it is larger, obviously has a problem. Verify that no short after rectifying diode.
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