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17th November 2012, 06:29 PM
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#1 |
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diyAudio Member
Join Date: Jun 2012
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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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17th November 2012, 07:08 PM
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#2 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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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?
__________________
Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links |
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17th November 2012, 07:18 PM
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#3 |
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diyAudio Member
Join Date: Jun 2012
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I didnt replace the Driver IC (MIC4424CN)
Power supply fets get hot within 1 sec |
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17th November 2012, 07:23 PM
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#4 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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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.
__________________
Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links |
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17th November 2012, 07:36 PM
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#5 |
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diyAudio Member
Join Date: Jun 2012
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With them jumped and the IC Removed the amp powers up and idles perfectly
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17th November 2012, 07:44 PM
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#6 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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Replace the driver IC. Don't forget to remove the jumpers.
__________________
Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links |
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23rd November 2012, 12:56 AM
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#7 |
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diyAudio Member
Join Date: Jun 2012
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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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23rd November 2012, 01:11 AM
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#8 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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I'd use 3205s.
__________________
Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links |
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23rd November 2012, 01:13 AM
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#9 |
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diyAudio Member
Join Date: Jun 2012
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Can i use the 10 ohm gate resisors?
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23rd November 2012, 01:16 AM
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#10 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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Yes. I never replace them in earthquake amps and have never had any problems.
__________________
Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links |
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