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Old 13th September 2011, 02:33 AM   #21
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I think this regulator should be rated for 1 amp of current. The 26 ohm load seems low (an older version reads 200 ohms) but I think it should be able to maintain voltage if it's not defective. Did you check the voltage on the output to see if it was 5v before you removed it?
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Old 13th September 2011, 02:52 AM   #22
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Output is good.. I still have a problem though in the output section..

Amp powers on and starts drawing excessive current.. If i remove the rectifier amp powers up and idles perfectly..

I checked all drivers and replaced the outputs ..

Any ideas on where to check?
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Old 13th September 2011, 02:56 AM   #23
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Ok i found that problem dont know how but the outputs shorted again..
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Old 13th September 2011, 04:38 AM   #24
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Did you check all of the resistors near the outputs. Sometimes they open which can cause the outputs to fail.
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Old 13th September 2011, 09:01 PM   #25
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Would 47.5 ohm 1% work for the power supply fets?
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Old 13th September 2011, 09:12 PM   #26
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Yes.
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Old 20th September 2011, 12:48 AM   #27
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If i leave the outputs out of the amp and power it up R515 and R516 will burn up..

Is this normal since there are no outputs in the amp or do i have another problem?
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Old 20th September 2011, 01:03 AM   #28
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I'm not 100% sure but I think that they drive the gate of the FET and nothing else. Are you sure that there is no tiny solder bridge (top or bottom of the board)?
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Old 20th September 2011, 01:34 AM   #29
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I cannot find any solder bridges on top or bottom of the board.
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Old 20th September 2011, 01:44 AM   #30
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Follow the traces. Do those components go to anything other than the gate of the low side FETs?

The 10 ohm and the diode are in series. Those are in parallel with the 47 ohm resistor.
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