I am working to repair a Pioneer SX950 receiver. The left amplifier channel is not working and frys the voice coil of speaker woofer. I discovered two burnt resistors on the amplifier board (R37, R41, pictured). The transistor right next to one of the resistors had burn marks on it, but i think it was just residual from the resistor. Now need to identify the cause. The circuit protection is not working, but also thinking there may be an issue with the power supply board. Attached is schematic with problem resistors and transistor marked. If anyone could give me an idea of where to look that would be great
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