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18th November 2010, 03:42 PM
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#1 |
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diyAudio Member
Join Date: Jan 2010
Location: memphis tn
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brutus 1600w
ok i have this amp for repair it had a burnt power supply,and the relay doesn't engage.i changed the drive transistors, gate resistors.but the power supply fet's sitll over heat and short. what else would cause this?
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18th November 2010, 03:51 PM
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#2 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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How much current is it drawing when you power it up?
Is the protection LED lit?
__________________
Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links |
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18th November 2010, 04:15 PM
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#4 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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Does this amp use the HIP4080 IC?
__________________
Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links |
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18th November 2010, 04:31 PM
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#6 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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Can you post a photo of the audio driver board?
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Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links |
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18th November 2010, 05:47 PM
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#8 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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That's the power supply driver board. Is there an audio driver board?
__________________
Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links |
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18th November 2010, 06:02 PM
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#10 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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With this driver board, I've heard that replacing the 2 TL072s on the driver board will restore audio. I've never run into this fault so I can't confirm that this information is accurate.
Have you run all of the pots and switches through their entire range to see if the amp will produce audio? When amps using this board are going into protect for no apparent reason (all FETs OK), the two MMBTA42s in the center of the board are generally the cause.
__________________
Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links |
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