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:
Whatsminer M20S single hash board uses a total of 105 hash chips, the model is "KF1920", and the signal direction is sequentially transmitted from U1 to U105.
Signal direction: "CLK / RXD / RST/CTSI", transfer from U1 to U105, "TXD" transfer from U105 to U1
The whole board has a total of 35 voltage domains, each voltage domain contains 3 chips, a total of 105 chips
Hach board provides 5 test points for easy inspection and maintenance
They are: "CLK / TXD / CTSI / RXD / RXT"
By measuring the voltage and resistance of the test point, you can find the corresponding bad chip
click to download:Whatsminer M20S Hashboard Repair Guide
Related maintenance tools:
ZHIPU electric screwdriver set with two batteries and various screw heads
PICkit4 In-Circuit Debugger Programmer
Medium temperature solder paste
ANLIXIN-862D High Quality Desoldering Station Combination Tool
Click to see more miner maintenance tools
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Dear Customers
Hello, due to the upcoming National Day in China, international logistics will be suspended. Our company will suspend shipments on September 28, 2023, and resume out-of-warehouse shipments on October 6, 2023. We sincerely apologize for the inconvenience caused to you. Thank you for your trust and support.
Best wishes,
ZEUS MINING CO., LTD
China Mainland Hong Kong 
Business Hours: (GMT+8) 08:30-20:00 Mon to Sat 
Company Phone: +86-023-72227777