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Old 8th January 2010, 08:33 PM   #1
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Default Hifonics hercules xi

when powering up the amp it goes into overload. I pulled 4 of the outputs and powerd it up and it seems not to go into overload.

First question is the outputs they are using are rfp70n06 whats a good sub for theese. its my own amp so getting the excat part really doesnt matter to me
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Old 8th January 2010, 08:58 PM   #2
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Can you post a photo of the board?
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Old 8th January 2010, 09:23 PM   #3
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Pic of amp hifonics hercules xi
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File Type: jpg amp1.JPG (142.4 KB, 47 views)
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Old 8th January 2010, 09:26 PM   #4
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Were any of the outputs shorted?

If you pull the 4080 and reinstall the outputs, does it go into protect/overload?
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Old 8th January 2010, 09:30 PM   #5
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i shorted one of the outputs accidently i replaced the 4080 but i can pull it out stick 3 of the 4 outputs back in to test
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Old 8th January 2010, 09:37 PM   #6
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It should work with 7 of the 8 outputs in it well enough to tell you if it has any other problems. Be sure to clamp them.

If it works properly, I'd suggest ordering the original parts. There probably aren't many compatible parts and it may take a bit of trial and error to find something that will work. Digikey has the original parts.
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Old 8th January 2010, 09:41 PM   #7
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yeah guess ill have to order the parts since i toasted another 1 or 2 of them
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Old 8th January 2010, 09:45 PM   #8
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If any failed while the new IC was in the socket, it's VERY likely that the IC has been damaged and will need to be replaced.
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Old 8th January 2010, 09:50 PM   #9
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i pulled the ic 4080 and thats when they started failing
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Old 8th January 2010, 10:08 PM   #10
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In most of these amps that I've seen ,there were 47k or 100k ohm pulldown resistors connected between the gate and source. These kept the outputs switched off if you pulled the IC.

With the outputs and the 4080 out of the circuit, do you read between 47k and 100k ohms between the gate pad and the source pad for the output? If not, it's not safe to pull the 4080 in this amp.
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