I’ve got an 750w mono block amp that’s virtually just over a years old and it failed while driving. Turns out it’s just out of warranty so I stripped it down to have a look to find a burnt out MOSFET irf3025. I got some new ones and replaced the burnt out one only to hear it pop as soon as I turned it back on. I would like to see if I could repair it. I found a thread with the same problem (kicker sx1250.1 burnt power transistor) and can follow the directions somewhat but I can’t find the QO5 driver transistor to test.
The burnt mosfet is Q8 , pins 1-2 are 4.5Mohms, pins 2-3 are 4.5Mohms and 1-3 are 68.7ohms
In the other post it’s noted that from 1-3 should be 47ohms which is what the others are except the burnt out one which is reading higher. Is there anything else I can test or am I better off buying a new one? (I’m a mechanic by trade so I have some electrical knowledge and if it’s not to complicated would like to try repair it)
The burnt mosfet is Q8 , pins 1-2 are 4.5Mohms, pins 2-3 are 4.5Mohms and 1-3 are 68.7ohms
In the other post it’s noted that from 1-3 should be 47ohms which is what the others are except the burnt out one which is reading higher. Is there anything else I can test or am I better off buying a new one? (I’m a mechanic by trade so I have some electrical knowledge and if it’s not to complicated would like to try repair it)
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Are the resistance readings from the board or from the FET?
What's the part number on the 16 pin IC?
If you haven't done so already, you need to do is to read the following page.
http://www.bcae1.com/repairbasicsforbcae1/repairbasics.htm
What's the part number on the 16 pin IC?
If you haven't done so already, you need to do is to read the following page.
http://www.bcae1.com/repairbasicsforbcae1/repairbasics.htm