hello friends here starting a new adventure Well friends I bought this amplifier rockford brand fosgate model p10002 buy it damaged from start the problem was that it burned the fuses and the problem was removed by removing the output mosfets of which only 1 fqa36p15 was saved , then note that in pad 1 (gate) had 39v and pad 3 (source) 54v how much voltage should I have in both? Well I decided to place 1 mosfet per group and a power voltage of 10v when turning on it shows me a consumption of 2.34ampers and 2 seconds after I burned the mosfets I have already checked the Gates resistors and they were 2 of 22 ohms and 1 of 39 ohms open as resistances of 0.1 ohms were replaced and I decided to try again, 2 seconds later the mosfets were burned and a current consumption of 4 ampers followed looking for how much voltage I should have in pads 1 and 3 of the mosfets is equal for channel N and P channel I appreciate your help guys
NOTE: the resistors from 0.1 ohms to 5w are only for proof I have already bought the originals
NOTE: the resistors from 0.1 ohms to 5w are only for proof I have already bought the originals
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It appears the source resistors for the outputs are defective and the drivers for the outputs are likely shorted also
If the 0.1 ohm source resistors opened or went well out of tolerance, you likely have damage to the protection circuit.
You can't really use voltage on the output transistors to troubleshoot unless the outputs are in the circuit
Did you reduce the bias setting (fully counterclockwise) before powering up the amp? The bias requirements for the new FETs may be different.
You can't really use voltage on the output transistors to troubleshoot unless the outputs are in the circuit
Did you reduce the bias setting (fully counterclockwise) before powering up the amp? The bias requirements for the new FETs may be different.
If I did it in the opposite direction, now it has worked and it does not burn the mosfets after replacing the resistors of 0.1 ohms and 3 of 39 ohms smd already having the new mosfets installed. How are the potentiometers calibrated in the outputs?
This is how I set it. This has to be done after the outputs are tightly clamped to the heatsink.
http://www.bcae1.com/temp/ausettingbias.swf
http://www.bcae1.com/temp/ausettingbias.swf
well try it tomorrow now I am already working in my job, just for doubt in this case the amplifier is 2 channels so I will do it observing a slight increase of amperes in my power source? How many amperes should you increase?
The increase only needs to be minimal. All you want is to get the output transistors to just barely start to pass current.
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