Bitmain Antminer S21
The Bitmain Antminer S21 delivers a higher hashrate compared to many other models, making it a powerful option for mining. Like all miners, however, it can face issues when certain chips or components fail. The good news is that if only a few chips are bad, the Antminer S21 can often be repaired after running the hashboard through a tester.
But if the board has sustained electrical damage from excessive power, it often leads to widespread failure—sometimes with many ASIC chips cracked or burnt. Using a scope to carefully inspect the chip surfaces is one of the best ways to identify which chips are faulty.
Why the Voltage Amplifier Matters
If your antminer s21 hashboard is not hashing, the issue is often related to faulty chips. However, it’s equally important to check both the LDO regulators and the voltage amplifier.
The voltage amplifier plays a crucial role by managing the five essential signals that pass through the board. These signals must maintain stable values as they travel across the amplifier.
The expected values are:
- BI (0V)
- CLK (0.6V)
- RI (1.2V)
- CI (1.2V)
- RST (1.2V)
When measuring, the amplifier input spot should match the amplifier output spot. If there’s a mismatch, it indicates a problem with either the amplifier itself or with surrounding components on the hashboard.
Final Notes
Understanding the voltage amplifier and the flow of signals is key to repairing the Antminer S21. Whether you’re working on replacing chips, testing the board with specialized tools, or checking for failures in Bitmain Antminer hashboards, always confirm that the amplifier signals remain consistent.
By paying attention to the amplifier, LDOs, and ASIC chips, you can bring your antminer s21 back to stable hashing performance.