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brutus 1600w
brutus 1600w
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Old 18th November 2010, 04:42 PM   #1
timwebb is offline timwebb  United States
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Default 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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Old 18th November 2010, 04:51 PM   #2
Perry Babin is offline Perry Babin  United States
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How much current is it drawing when you power it up?

Is the protection LED lit?
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Old 18th November 2010, 05:08 PM   #3
timwebb is offline timwebb  United States
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it draws 5amps and the green comes on with all the fet's in.
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Old 18th November 2010, 05:15 PM   #4
Perry Babin is offline Perry Babin  United States
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Does this amp use the HIP4080 IC?
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Old 18th November 2010, 05:28 PM   #5
timwebb is offline timwebb  United States
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no its the 2009 brutus
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Old 18th November 2010, 05:31 PM   #6
Perry Babin is offline Perry Babin  United States
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Can you post a photo of the audio driver board?
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Old 18th November 2010, 06:45 PM   #7
timwebb is offline timwebb  United States
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here's the driver board.
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File Type: jpg CIMG0038.jpg (429.7 KB, 99 views)
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Old 18th November 2010, 06:47 PM   #8
Perry Babin is offline Perry Babin  United States
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That's the power supply driver board. Is there an audio driver board?
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Old 18th November 2010, 06:55 PM   #9
timwebb is offline timwebb  United States
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here's the audio driver board.
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Old 18th November 2010, 07:02 PM   #10
Perry Babin is offline Perry Babin  United States
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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.
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