（Antminer S9 and S9i hash boards are the same, and the maintenance methods are also the same）
This version contains the basic circuit schematic diagram and chip signal direction and voltage introduction
We are currently publishing in Chinese, the English version will be released soon
Basic overview:
Antminer S9 single hash board uses a total of 63 hash chips, the model is "BM1387", and the signal direction is sequentially transmitted from U1 to U63.
S9 Hashboard has 21 voltage domains in total, and each voltage domain contains 3 chips. There is a voltage difference between the voltage domains, if the difference is abnormal, the hash board will not work
It uses 5 test points for inspection and maintenance
The five test points are: CLK / CO / RI / RST / BO
For a description of test points, see:
Fix: Description of Antminer Hashboard test points
In this version, we provide more detailed circuit schematics:
Antminer S9（S9i） hash board repair guide download address:
click to download: S9 Repair guide manual[EN]
Click to watch: Antminer S9 Hashboard repair video tutorial
Related maintenance tools:
Antminer Test Fixture for S9 T9+ S9k S9se
Multi-function test fixture S9.S9j.S9k.S9se.S11. S15.T15.S17.T17...
Click to see more miner maintenance tools
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