Antminer Repair Course - ZMRC

Antminer maintenance courses are divided basic theoretical explanations about hash board and troubleshooting operations. It mainly includes Antminer hash board repair courses, such as Antminer S9 hash board repair course, S17 T17+ hash board repair course, S19 hash board repair training, L3+ hash board repair class, L7 hash board repair training, etc. Each video will explain in detail how to repair the hash board, as well as the troubleshooting ideas for the hash board failure. For example, the common faults of the hash board: the single board test reports 0, the test fixture cannot detect all ASIC chips, the PIC chip is abnormal, etc.

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S9 Hash Board丨Structure & Powering

Antminer S9 hash board repair is the main course for learning ASIC miners. How to repair Antminer S9 hash board? First, we start by learning the structure and power supply process of the S9 hash board. When the S9 hash board cannot work normally, the first step is to check whether its input voltage and DC-DC step-down circuit are abnormal. The S9 hash board repair tutorial video takes you to learn its fault diagnosis.
S9 Hash Board丨PIC Chip

Why cant the S9 control board control the start and stop of the hash board? At this time, it is necessary to check whether the PIC chip is faulty. The PIC chip is a device that stores the frequency information and voltage value of the hash board, and the DC output voltage of the hash board can also be controlled through the PIC chip. This course mainly explains how to troubleshoot the PIC chip and how to correctly burn the PIC program.
S9 Hash Board丨Domain Powering Circuit

S9 hash board has a total of 21 domains, and each domain consists of 3 BM1387 ASIC chips. Powered by the 8.9V generated by the DC control circuit, each domain gets a domain voltage around 0.4V. This course will explain the domain powering process of the S9 hash board, how to measure the domain voltage correctly, and how to troubleshoot the domain with abnormal domain voltage?
S9 Hash Board丨LDO Powering Circuit For Last 5 Voltage Domains

Different versions of the S9 hash board will have different LDO powering circuits for the last 5 domains. The last 5 voltage domains LDO powering circuit can be divided a 14V boost circuit and a 12V power supply input voltage circuit. This tutorial video will lead you to learn the LDO 1.8V and 0.8V powering of the last 5 voltage domains of the S9 hash board and the troubleshooting ideas.
S9 Hash Board丨5 Signal Transmission Directions

Signal abnormality is also one of the main reasons for the failure of the S9 hash board. Remember, the S9 hash board has a total of 5 signals, namely CLK, RI, CO, BO and RST. When the test result of the test fixture reports 0 and the powering is normal, it is necessary to check whether the voltages of the 5 test points are abnormal. This tutorial video will explain in detail the test points of 5 signals and their troubleshooting ideas.
S9 Hash Board丨Temperature Sensing Circuit

Antminer S9 hash board has 2 temperature senses: TEMP (PCB) and TEMP (CHIP). The normal range of the chip temperature is 65℃-125℃, if it exceeds this temperature range, the red light will flash and alarm, and it will enter the shutdown protection mode. If the temperature control circuit fails, the temperature will not be detected, and "0" will be reported in the test result of the test fixture.
T17 Hash Board丨Powering Process

The structure of Antminer 17 series hash board is basically the same, 17 series mainly use APW9 PSU and APW9+ power supply. This course video mainly takes the T17 hash board as an example to introduce the repair tips of the powering process of the 17 series hash board. Remember, 17 series hash board has no voltage output if only the PSU is connected, and there will have a 16V-21V voltage output only when the control board is started.
T17 Hash Board丨Signal Transmission

When the powering of the hash board is normal, the ASIC chip of the T17 hash board will have signal transmission. The T17 hash board has a total of 5 signals, CLK, CO, RI, BO and RST. It should be noted that if any one of the signals is abnormal, there will be no hash rate. This tutorial video will introduce how to troubleshoot the signal fault if the T17 hash board single-board test report is 0.
T17 Hash Board丨Temperature Sensing Circuit

The temperature sensing circuit of Antminer T17 hash board consists of ASIC chip and temperature sensor chip. The "TMP451" displayed on the barcode on the hash board indicates that the model of the temperature sensor chip used on the board is TMP451. Thermal sensors detect the temperature of the PCB and ASIC chips. If any of the 4 temperature sensor chips are not recognized, the hash board will not function properly.
Antminer S17+ Hash Board Repair Tutorial

Antminer S17+ hash board has a total of 65 BM1397 chips, which are divided 13 voltage domains, each domain has 5 chips, and each group of domains gets a 1.5V domain supply. when the powering is normal, there will be signal transmission. If the S17+ hash board single-board test reports 0, we need to check whether the powering unit and the signals of the ASIC chip are abnormal. The S17+ hash board repair tutorial course begins. . .
Antminer T17e Hash Board Repair Tutorial

Antminer T17e hash board has the same structure as the S17+ hash board, but the number of chips is different, so the maintenance method is roughly the same. During the repair the T17e hash board, if a signal is abnormal, first check whether the domain powering and LDO 1.8V powering are normal. If the power supply is normal, it may be that a chip in a certain domain is in poor contact or faulty. Find the faulty chip and resolder it or replace it.
Antminer S17 S17Pro Hash Board Repair Tutorial

The structure of the Antminer S17 hash board is the same as that of the S17 Pro hash board, so the repair ideas of these two hash boards are the same. This video will take S17 hash board repair as an example to explain in detail the powering process and signal transimission. It should be noted that the signal test points of these two hash boards are different from other hash boards. Please check the video tutorial for details.
Antminer S17e Hash Board Repair Tutorial

Antminer S17e hash board is made up of 15 voltage domains in series, each 9 ASIC chips connected in parallel is a domain, and the domain voltage is about 1.2V. Each domain of the S17e hash board has 2 1.8V LDO tubes and 2 0.8V PLL tubes, which together supply power to 9 chips in each domain. For more information on the S17e hash board, please watch the Antminer S17e hash board repair tutorial video.
Antminer T17+ Hash Board Repair Tutorial

Antminer T17+ Hash board repair tutorial video mainly explains its main powering, domain powering, boost circuit, LDO powering, 5 signal transmission directions and temperature sensing circuit. When we repair the ASIC miner hash board, the first step is to judge whether the power supply of the hash board is normal, then check the signal transmission, and finally check whether the temperature sensing circuit is normal.
Antminer L3+ Hash Board Repair Tutorial

Antminer L3+ hash board is the hash board that miner maintenance personnel repair a lot. When troubleshooting the L3+ hash board, our idea is to first check whether the main powering, domain powering, boost circuit and LDO powering are normal, and then check whether the voltages of its 5 signals are normal, and finally check its temperature sensing circuit. This video tutorial will explain the troubleshooting principle in detail.
Antminer S19 Hash Board Repair Tutorial

Antminer S19 hash board has 76 BM1398 ASIC chips and is powered by APW12 PSU. The conduction condition of these 4 MOS tubes is that their G-pole input is high level. When the PIC chip is working normally and 3.3V is input, the four MOS tubes will be turned on.Quickly learn how to properly repair an S19 hash board with the Antminer S19 hash board repair tutorial video.
S9 hash board丨How to understand the kernel logs?

As professional miner maintenance personnel, if the backstage status page of the miner shows no data or cannot determine the fault, we must know how to view the kernel logs of the miner, so as to further judge the fault of the miner and perform maintenance. In this lesson, we will explain how to correctly interpret the Antminer kernel log.
S19 hash board丨DC circuit

On the Antminer S19 hash board, the DC circuit is used to control the conduction of the circuit between the ASIC chip and the control board. When the DC circuit outputs 0V, the domain voltage cannot be provided, and the whole hash board cannot work. Master the working principle and repair ideas of the S19 hash board DC circuit, and easily complete troubleshooting.
S19 hash board丨PIC chip

The PIC chip is used to store the computing frequency and related operating voltage information of the Antminer S19 hash board, and to control the communication between the DC circuit and the control board. The voltages of pin 1, pin 2, pin 9 and pin 10 of the PIC chip are all 3.3V. If the log shows that the PIC is faulty, you need to check the voltage of these pins first. If the voltage is normal, proceed to the next step of troubleshooting.
S19 hash board丨19V boost circuit

The Antminer S19 hash board consists of 38 voltage domains, among which, the LDO chips of the last 7 voltage domains are powered by booster circuits. The boost circuit of the S19 hash board boosts the input voltage from 14V to 19V output. How to troubleshoot if the boost circuit is broken? This video will explain in detail the repair ideas of the boost circuit and demonstrate how to measure the voltage.
S19 hash board丨21V boost circuit

There are two boost circuits on the Antminer S19 hash board. This video mainly explains the 21V boost circuit. The 21V boost circuit on the back of the S19 hash board is mainly used to turn on the 4 MOS tubes on the front. If these 4 MOS tubes cannot work normally, there may be an abnormality in the 21V boost circuit.
S19 hash board丨Temperature sensing circuit

The Antminer S19 hash board has a total of 4 temperature-sensing chips, which are connected in parallel and are located on the back of the hash board. If the log shows PIC sensor NG, it means that the temperature sensing is abnormal. This lesson will mainly explain how the temperature sensing circuit works and demonstrate how to make measurements.
S19 hash board丨U1 and U2 Level Converter Chip

When repairing the Antminer S19 hash board, if the voltage of all ASIC chips is normal, but the hash board cannot be recognized by the control board, it may be that the level conversion chips at U1 and U2 are faulty. The U1 chip is used to convert the voltage of the RI signal, and the U2 chip is used to convert the voltage of the CI signal. Only when these two chips are working normally, the control board and the hash board can communicate normally.
S9 hash board troubleshooting丨Abnormal input voltage

The input voltage of the Antminer S9 hash board is 12V, which is reduced to 8.9V by the DC-DC circuit to supply power to each voltage domain. If the 12V input voltage is abnormal, the hash board will not work. What conditions will lead to abnormal power input voltage? This video will go detail and demonstrate troubleshooting.
S9 hash board troubleshooting丨DC-DC step-down circuit

How does the DC-DC step-down circuit on the Antminer V4.2 S9 hash board work? When it breaks down, what are the maintenance ideas and methods? This lesson will mainly explain its working principle, main measurement points, and demonstration of troubleshooting methods. Only when the DC buck circuit converts the input voltage 12V to 8.9V output, the hash board can work normally.
S9 hash board troubleshooting丨PIC chip fault

The PIC16F1704 chip is used to store the working information of the hash board, and the output voltage of the DC circuit can be controlled on the S9 hash board. Therefore, when the PIC chip fails, it will cause insufficient power supply to the hash board. Generally, faults caused by PIC chip can be resolved by reprogramming or replacing it with the same type of chip.
S9 hash board troubleshooting丨LDO powering circuit

The LDO powering of Antminer S9 hash board is composed of 1.8V and 0.8V powering, and 0.8V is obtained by dividing the voltage of 1.8V powering through two resistors in series. An abnormal powering of any LDO chip will cause the ASIC chip to fail to operate normally. This video will explain in detail the working principle of the LDO powering circuit, and demonstrate the measurement and repair methods.
S9 hash board troubleshooting丨Boost circuit repair method

The boost circuit on the Antminer S9 hash board is used to boost the 8.9V of the DC-DC circuit to 14V and provide LDO power for the last 5 voltage domains. The voltage of the boost circuit is higher than the normal value, which will easily cause damage to the LDO chips and ASIC chips in the last 5 voltage domains, and the hash board will not work normally.
S9 hash board troubleshooting丨Temperature sensing circuit fault

The temperature sensing circuit consists of TEMP(CHIP) and TEMP(PCB), which are used to transmit the temperature parameters on the hash board to the control board. On the Antminer S9 hash board, the chip temperature is collected by the built-in sensor of the ASIC chip, and the PCB temperature is collected by the temperature sensing chip U89.
S9 hash board troubleshooting丨Report 0 failure

In this lesson, we will explain in detail the repair method of the Antminer S9 hash board that shows 0 ASIC chips. When the detection result of the hash board is 0 ASIC, it is first necessary to check whether the powering of the hash board is normal. If the powering is normal, check whether the RI signal is abnormal, find out the faulty voltage domain, and replace the short-circuited ASIC chip.
S9 hash board troubleshooting丨U88 CT1F level converter chip

U88 CT1F on the Antminer S9 hash board is a level conversion chip for the RI signal. The function of this chip is to convert the voltage, and convert the 3.3V voltage input by the control board through the IO interface 1.8V. All ASIC chips on the S9 hash board can be recognized by the control board only when the chip can work normally.

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