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bigpun4fubu 26th August 2012 09:34 PM

Hifonics Brutus Bxi 2006D in protect
ok it would go into protect then removed driver board and would power up fine so had another driver board from another hifonics amp, identical to the original, installed it and would power up fine, then all of a sudden it would blow my 10 amp fuse when powering up checked output transistors in board and legs 2 and 3 on right bank of 6 would read 0 Ohms in circuit found the 2nd fet to be bad other 5 check good but what could cause excessive current draw even if the fets and driverboard are removed, ive removed 6 of the fets, and it powers up fine but seems to draw more than normal current, when i install just the driver board back in circuit it goes back into protect

Perry Babin 26th August 2012 09:49 PM

Are you sure that you don't have solder bridges between the pads for the outputs or the driver board?

bigpun4fubu 26th August 2012 10:16 PM

solder pads are good but read 0 ohms between pads 2 and 3 on each section

Perry Babin 26th August 2012 10:18 PM

Transistors on the other side of the amp can make it appear that there is a short on the side with no transistors.

bigpun4fubu 26th August 2012 10:28 PM

ok im going to remove other 6 fets and see, they are reading like the others in circuit ill post results

bigpun4fubu 26th August 2012 10:46 PM

solder pads check good on all 12 places after removing all outputs , going to see if goes into protect with driver board installed and check those 6 fets

bigpun4fubu 27th August 2012 12:40 AM

powers up fine with driver board in and outputs removed , going to replace all outputs

bigpun4fubu 30th August 2012 02:00 AM

replaced outputs the bank of outputs on speaker terminal side 1st fet reads near 0 ohms in circuit but good out of circuit it is Q204

Perry Babin 30th August 2012 07:37 PM

Are you sure that only one reads 0 ohms in the board?

0 ohms between which legs?

bigpun4fubu 30th August 2012 07:56 PM

Between legs 2and 3 , I'll double check to see if others read funny, could it be the driver board? I could remove it and check the fets again?

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