I believe the operation is that there is a SCR on the heatsink that is on the output of the bridge rectifier, the SCR is controlled by the microprocessor and ramps up the DC at power up, so even if the motor has a command initially it does not go into full power, the DC ramp up controls this, so a suspect in this case would be the SCR on the heat sink.Yes now I only work with halogen bulb and filament, but I think the voltage on the 560uF / 400v capacitor is too high.
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by Ikimi .O