hifonics drive board

[legion2710]

i tried this board in two amps and the same ting happend ,2 output transistors blew and all the power supply mosfet.amp played clean and all of a sudden it blew.what on the drive card could cause this to happen?

 

[Perry Babin]

Why did you swap the driver board to the other amp instead of repairing the driver board that was originally in the amp?

 

[legion2710]

the other amp driver board was missing.i did know the card was blowing the mosfets .because the same ting happened to the other amp.never encountered this problem before .have you?

 

[Perry Babin]

I have not. If you get it working again, check the oscillation frequency at the input of the output filter inductors.

 

[legion2710]

I have not. If you get it working again, check the oscillation frequency at the input of the output filter inductors.

what on this board causes the amp to go into protect mode??

 

[Perry Babin]

DC offset
Over-current
Over-voltage
Thermal

See attached.

 

[Henserv]

the other amp driver board was missing.i did know the card was blowing the mosfets .because the same ting happened to the other amp.never encountered this problem before .have you?

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