How to measure the powering voltages of the APW12 1215b PSU?

The running Bitmain S19a suddenly stopped and there was no hash rate. First of all, consider whether there is an abnormality in the power supply, that is, the output voltage of the apw12 12V-15V PSU used is abnormal. When repairing the power supply, it is necessary to accurately measure the important voltages on the power board, so that specific faults can be quickly located and repaired to reduce losses caused by downtime.

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