Whatsminer P221C main power chip optocoupler feedback circuit
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The optocoupler feedback circuit of the P221C main power chip is one of the important circuits. It consists of three parts, namely the optocoupler feedback of the No. 1 auxiliary power chip, the optocoupler feedback of the No. 2 auxiliary power chip, and the optocoupler feedback of the PFC chip. Learn how these optocoupler feedback circuits work and measure them for easy troubleshooting.
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