Antminer S9 hash board basics for temp sensing circuit

Antminer S9 hash board has 2 temperature senses: TEMP (PCB) and TEMP (CHIP). The normal range of the chip temperature is 65℃-125℃, if it exceeds this temperature range, the red light will flash and alarm, and it will enter the shutdown protection mode. If the temperature control circuit fails, the temperature will not be detected, and "0" will be reported in the test result of the test fixture.

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