Replacing IRFZ42 in Alpine 3558 advice needed....(pics)

[TO-3]

thanks.. the gate resistors of the other 2 mosfets have a value of 200 ohm (red,black, brown), would this be normal? or should i stick with your recommendation.

heres what another member on another forum diagnosed.


out of the 4 mosfets.. only 2 are causing the problems..

Yes, stick with the 200 ohm guys. One thing that could possibly be happening is the transformer may be shorted on the primary that is connected to those FETs. You would have to remove the leads from the board to diagnose this.