Antminer KS5 log reports 0 ASIC fault diagnosis tutorial

When the Antminer KS5 miner experiences a drop in operating efficiency, the hash board ceases to hash. How to quickly locate the cause of the fault and repair it? This article provides detailed troubleshooting steps to restore the miner's normal profitability.

Troubleshooting decomposition steps

1. Find the fault report

First check the fault display in the kernel log, reporting chain 0 "detected asic num less than design (0<92)", indicating that there should be 92 ASIC chips under normal circumstances, but now only 0 is detected, which is less than the set value.

2. Speculate on the cause of this failure

a. The ASIC chip is damaged, or signal transmission is interrupted.

b. RO (RI/RX) signal voltage is abnormal.

c. Level conversion chip failure.

Conduct a follow-up investigation based on the potential fault factors identified above.

3. How to solve the Antminer KS5 hash board reporting 0 failures?

3.1 Use a universal test fixture to perform fault detection on the hash board. Refer to the following video to build a test platform and start testing.

3.2 Check the total domain voltage and boost voltage of the hash board

After the test fixture confirms the fault, first check whether the total domain voltage and boost voltage of the faulty hash board are within the normal range. Refer to the miner specification parameters. If the results are expected but the fixture still reports 0, continue troubleshooting.

3.3 Check the RO (RI/RX) signal voltage of the hash board

a. It is recommended to select half of the total number of chips for detection. For example, check whether the RO (RI/RX) signal voltage of chip No. 46 is 1.2V.

• If it is abnormal, the signal line or chip may be damaged. Step by step to find the fault point.

• If it is normal, it means that the signal transmission between chip No. 92 and chip No. 46 is fault-free. Continue with subsequent operations.

b. Use the same method to check whether the RO (RI/RX) signal voltage of chips No. 45 to No. 1 is normal.

c. If the results are normal after the above tests, check whether the pin voltage of the level conversion chip of the RO (RI/RX) signal is abnormal. If there is no output or the voltage is unstable, the chip needs to be replaced.

The Antminer KS5 hash board reports 0 failures, which are usually caused by ASIC chip failures, voltage abnormalities, or signal transmission problems. If other hash boards report 0 ASIC failures, the same method above can be used for troubleshooting. Continue to pay attention to ZEUS MINING's troubleshooting articles for additional mining maintenance and troubleshooting tips.