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Class D Switching Power Amplifiers and Power D/A conversion

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Old 31st August 2010, 08:18 PM   #1
Tom7227 is offline Tom7227  United States
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Perhaps someone can help me with this.

I am working on a MA Audio HK 4000 Class D amp with a power supply problem. The issue is it goes directly into Protect when the remote is connected.

The IRFP 064's are not shorted, and I removed all the IRFP 9240, 240's. So the issue is somewere with tl494's circuits.

Anybody might have a schematic.. or close
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