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# Explanation of the voltage domain of Antminer Hash Board

2020/4/20

Explanation of the voltage domain of Antminer Hash Board

To repair the miner's hash board, we first need to understand the structure of the hash board, including the circuit, chip type, voltage and signal transmission direction.

This article mainly describes the voltage domain of the hash code board. We know that the data signal of the hash board is transmitted from the U1 chip to the last chip, and then the "RI" signal is detected from the last chip and returned to the U1 chip. Most brand miners on the market use this signal transmission mode.

Due to the large number of chips in the Hashboard, in order to better control the voltage and stability of each chip, we group these chips, each group has independent power control.

If the voltage between the voltage domains is abnormal, the entire Hashboard will not work, which is usually caused by the damage of the chip in a certain voltage domain or the power management chip of the voltage domain.

Therefore, to detect whether the Hash board is healthy, measuring the voltage in the voltage domain is the most direct and effective method (run the Hash board through the test fixture and test at the same time)

Taking Antminer as an example, we have listed the voltage domain views and parameters of multiple miners for your reference: including L3 + / S9 / S9k / S9se / S15 / T15 / S17 ...

①: Antminer L3+

The L3+ single hash board has a total of 72 chips, divided into 12 voltage domains. Each voltage domain contains 6 chips. The voltage between the voltage domains is 0.80V. The voltage value of the first and last voltage domain is 9.6V

Calculation formula: 0.8V * 12 = 9.6V ②: Antminer S9

The S9 single hash board has a total of 63 chips, divided into 21 voltage domains. Each voltage domain contains 3 chips. The voltage between the voltage domains is 0.40V. The voltage value of the first and last voltage domain is 8.4V

Calculation formula: 0.4V * 21 = 8.4V ③: Antminer S9k (S9se is similar)

The S9k single hash board has a total of 60 chips, divided into 6 voltage domains. Each voltage domain contains 10 chips. The voltage between the voltage domains is 1.6V. The voltage value of the first and last voltage domain is 9.6V

Calculation formula: 1.6V * 6 = 9.6V ④: Antminer S15

The S15 single hash board has a total of 72 chips, divided into 12 voltage domains. Each voltage domain contains 6 chips. The voltage between the voltage domains is 1.53V. The voltage value of the first and last voltage domain is 18.36V

Calculation formula: 1.53V * 12 = 18.36V ⑤: Antminer T15

The T15 single hash board has a total of 72 chips, divided into 12 voltage domains. Each voltage domain contains 6 chips. The voltage between the voltage domains is 1.65V. The voltage value of the first and last voltage domain is 19.8V

Calculation formula: 1.65V * 12 = 19.8V ⑥: Antminer S17

The S17 single hash board has a total of 48 chips, divided into 12 voltage domains. Each voltage domain contains 4 chips. The voltage between the voltage domains is 1.55V. The voltage value of the first and last voltage domain is 18.5V

Calculation formula: 1.55V * 12 = 18.5V Knowing the structure of the miner's hash board helps us quickly repair the miner. Due to the different measuring tools, the above parameters will have some small differences. We used Fluke 15B + multimeter for testing.

If your tools are different, it is recommended that friends use a good hash board to measure data and record parameters in order to obtain more accurate data.

Related maintenance tools:
New Fluke 15b + digital multimeter instrument with LED backlight

Click to view more repair tools

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