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Old 8th September 2011, 05:13 AM   #1
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Default Crossfire bmf1000d

Replaced the power supply transistors, gate resistors, the power supply drivers, and spent 3 hours cleaning the board. It comes on and plays but the idle current is 1.9a at 12.01v and the 2 heatsink clamped voltage regulators get hot pretty quickly when not clamped. Is this normal for this amp? The power supply transistors stay cool. I haven't load tested it yet. The positive regulator has around 11.6v on its output when the negative regualtor has 12v.
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Tek 2221 scope with 2 10x probes, 2 Fluke 115 true rms meters. 106a, 20a & 5a power supplies. I have read the BCAE scope page.
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Old 8th September 2011, 02:23 PM   #2
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It's normal for the regulators to get hot. I don't know what the idle current should be. 1.9 amps isn't excessively high.
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