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Help needed please, blown fets :(
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<blockquote data-quote="Spooney" data-source="post: 7173115" data-attributes="member: 584130"><p>You have to replace all of the fets that are in parallel with the ones that are blown if you want it to be reliable. The ones that are toasted are some of the power supply fets. I would think that there are more than four in parallel in an amp of this size. I would personally change all the ones with that same part number. You are going to want to search at either mouser or digikey for an HUF75339P. That is the full part number for that fet. You will also want to check the gate resistors connected to the first leg of each of these fets and the smaller power supply driver transistors that drive these fets. The power supply driver chip could be suspect as well. If you had an oscilloscope it would be easy to see if the power supply driver IC is putting out the correct signal.</p></blockquote><p></p>
[QUOTE="Spooney, post: 7173115, member: 584130"] You have to replace all of the fets that are in parallel with the ones that are blown if you want it to be reliable. The ones that are toasted are some of the power supply fets. I would think that there are more than four in parallel in an amp of this size. I would personally change all the ones with that same part number. You are going to want to search at either mouser or digikey for an HUF75339P. That is the full part number for that fet. You will also want to check the gate resistors connected to the first leg of each of these fets and the smaller power supply driver transistors that drive these fets. The power supply driver chip could be suspect as well. If you had an oscilloscope it would be easy to see if the power supply driver IC is putting out the correct signal. [/QUOTE]
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Help needed please, blown fets :(
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