Ada

@Ada

2023-07-10 11:19 Publish comments

Do single board test to see the issue. If report 0,check the RI signal from the last chip. If report x asic, check the domain voltage where the chip located.

The last five voltage domains have voltage, while the other domains do not. The 8.5V is present, but the LDOs have no voltage. What could be the problem causing this issue?

@Ada

2023-07-10 11:16 Publish comments

Test the IO port 3.3V.

What could be the issue if the hashboard does not have an 8.5V voltage supply?

@Ada

2023-07-10 11:14 Publish comments

Firstly, balance the voltage domains. Alternatively, you can short-circuit the RI signal to provide a stable 1.8V and check if it reports correctly. If the voltage domains are not functioning properly, it is likely that the signals will also be affected and not function correctly.

Which specific signals should be primarily examined when the T15 screen flickers and the RI1.8V signal fluctuates between 0.7V and 1.0V?

@Ada

2023-07-10 11:05 Publish comments

The 1.8V is directly from BM1387 chip.

In versions without the LOD , no 1.8V domain Voltage, how to check the input of 1.8V?

@Ada

2023-07-10 11:03 Publish comments

The CO signal voltage of some S9 hashboard versions is only 1.2V. Compare it with another working hashboard of the same model.

Which specific points should be checked when the CO signal on the S9 miner is only 1.2V starting from the first chip?

@Ada

2023-07-10 10:59 Publish comments

The last 5 domains' 1.8V are in parallel.

T9+ the last 3 domains transmit rule

@Ada

2023-07-10 10:56 Publish comments

There may be an issue with the 4th voltage domain counted from the end or that there is a missing VDD voltage domain, specifically the 15th voltage domain. The heat sink connected to the 15th voltage domain and 1.8V LDO in 10th voltage domain is conducting. If not conduct,jump to LDO pin 1,pin 3.

The LDO does not have a 2.2V input, but the other voltage domains are functioning normally.

@Ada

2023-07-10 10:51 Publish comments

Repair from the first step.

How can the insufficient voltage issue with the APW8_10V-11V be resolved?

@Ada

2023-07-10 10:49 Publish comments

First, perform a visual inspection to ensure an adequate power supply. If the power supply is insufficient, check the resistors near U1 to verify if they are functioning properly. Use a known good board as a reference for comparison. If the hashrate is still insufficient, replace the first chip. Additionally, during the voltage detection process, measure the 5 signals to see if there is any activity. By identifying the chip with abnormal signals among the 63 chips, the issue can be resolved.

Without detecting any voltage, in the end, even with chips number, there is insufficient hashrate. As shown in the image, how should this issue be addressed?

@Ada

2023-07-10 10:49 Publish comments

First, perform a visual inspection to ensure an adequate power supply. If the power supply is insufficient, check the resistors near U1 to verify if they are functioning properly. Use a known good board as a reference for comparison. If the hashrate is still insufficient, replace the first chip. Additionally, during the voltage detection process, measure the 5 signals to see if there is any activity. By identifying the chip with abnormal signals among the 63 chips, the issue can be resolved.

Without detecting any voltage, in the end, even with chips number, there is insufficient hashrate. As shown in the image, how should this issue be addressed?

@Ada

2023-07-10 10:46 Publish comments

First, resolve the issue with the RI return signal. Ensure that the RI signal is properly connected and functioning correctly. Additionally, measure the signals in the voltage domains to assess their integrity.

For the T17 miner, there is an imbalance in the domain voltage, with a report of 0. Some positions have a low RI return signal, while position 6 has no RI return signal. How can this issue be resolved?

@Ada

2023-07-10 10:44 Publish comments

Check the ground resistance of LDO is normal or abnormal. If it is abnormal, consider replacing the LDO. If it is normal, test the input voltage of pin 5 to determine if it is sufficient for voltage conversion.

What should be done if the 1.8V and 0.8V voltages are abnormal?