PFC circuit of Antminer APW12 1215 power supply

This video will explain and demonstrate the design structure and measurement method of the PFC circuit on the Antminer APW12 power supply. In the APW12 powering process, the input voltage is transmitted to the EMI filter circuit, then enters the PFC circuit and outputs 300V DC voltage. How should we troubleshoot if the PFC circuit fails?

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