Kicker zx 350.2 help

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Use IRFZ44V in all six mosfet locations. Replacing the drivers Q11,Q14-2N4401 and Q12,Q13-2N4403 would be recommended.

If you have an oscilloscope after replacing the drivers, and without any IRFZ44V in place, check the drive to the mosfet gates resistors and the triangle wave to Pin 5 of the TL494. The triangle wave should be a clean sawtooth and the drive pulses should be ~50% duty cycle @ ~20us or 50Khz.

The DC voltage measured with black probe on the power GND terminal block should be 1.5Vdc at Pin 5 of the TL494 and 5Vdc at the gate resistors
 
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Remove D13 and D14 to isolate between the amp and power supply.

If the current draw continues you can remove the IRFZ44V's and check the C3 (682/M) at Pin 5 of IC10 (TL494). With a scope if available check the triangle wave at Pin 5 (~15 microseconds) A DC voltmeter should read ~1.5 Vdc with the black probe on Power Ground Terminal.

There may be a shorted winding or underside rubbing a jumper in the transformer T1. By gentle twisting the transformer you may see a change in the current draw. If the transformer is rubbing this can be fixed by lifting the transformer and adding insolation to the point of rubbing.
 
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