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Old 17th November 2012, 06:29 PM   #1
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Default Earthquake 200DHC

I replaced the power supply fets in this amp (RFP50N06)

I also replaced the Outputs Orginals were STP50NE10 I replaced them with IRF3710Z

Also replaced the HIP4080


With just power and ground hooked yp the amp will draw excessive current..

Any ideas??
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Old 17th November 2012, 07:08 PM   #2
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Did you replace the 8-pin PS driver IC?

Do any of the PS FETs get hot if you power it up for a second?
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Old 17th November 2012, 07:18 PM   #3
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I didnt replace the Driver IC (MIC4424CN)

Power supply fets get hot within 1 sec
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Old 17th November 2012, 07:23 PM   #4
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That IC generally fails. If the board is out of the heatsink, solder a jumper between the input and output pins for that IC (inA to outA, inB to outB). Remove the IC and see if it will power up. Again, be careful when applying power.
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Old 17th November 2012, 07:36 PM   #5
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With them jumped and the IC Removed the amp powers up and idles perfectly
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Old 17th November 2012, 07:44 PM   #6
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Replace the driver IC. Don't forget to remove the jumpers.
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Old 23rd November 2012, 12:56 AM   #7
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This amp uses RFP50N06's as the power supply fets with 10 ohm gate resistors..


Is there a good sub for the fets since i burnt 2 of the new ones up..
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Old 23rd November 2012, 01:11 AM   #8
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I'd use 3205s.
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Old 23rd November 2012, 01:13 AM   #9
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Can i use the 10 ohm gate resisors?
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Old 23rd November 2012, 01:16 AM   #10
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Yes. I never replace them in earthquake amps and have never had any problems.
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