ASIC Repair Basics: Antminer S17 Common Faults and Solutions

Identifying and resolving faults within S17 hash boards can be a daunting task for those unfamiliar with the control circuit, but understanding the power supply scheme and components of the 0.8V voltage domain divider is essential to spotting potential issues quickly and efficiently.

Component Structure of the Hash Board

The Antminer S17 hash board comprises several components that work together to create a powerful mining system. The board itself contains 48 chips, each with its own voltage domain and signal transmission circuit. To ensure proper operation, the power supply must be set at 18.5V while 12 separate voltage domains are set at 1.55V each. In addition, J1-IO block connectors connect the mainboard to the rest of the miner’s components while communication signals flow between chips through CLK-RST-BO-CO and RI channels. Heat dissipation requires 4 cooling fans for optimal performance when testing parts of the hash board. At the same time, miners in software mode without sweeping frequency will need to change their repair mode under fixture config file settings to 1 so that EEPROM data is not cleared during tests.

Signal Transmission Circuit and Test Point Identification

Signal Transmission Circuit and Test Point Identification are essential for properly operating the Antminer S17 hash board. The signal CLK-RST-BO-CO is transmitted from the first chip to the second one until it reaches the 48th chip. The RI signal is then transmitted from this 48th chip back to the first chip reversely. There are 12 voltage domains, with each two voltage domains having 1.55V of power supply. Furthermore, J1-IO block connectors securely connect the mainboard to all other components while communication signals travel between chips through CLK-RST-BO-CO and RI channels. To identify test points in a hash board, several steps need to be taken: First, the Signal Test Point Identification should be made, which includes the identification of signal pins and ordering of test points according to their sequence. Then, a distribution map of Voltage Domain Test Points needs to be created to show where precisely each test point is located. Finally, an illustration or photograph of the real product should be provided as a reference for further tests and/or repairs if necessary. This can also help technicians better understand the structure of the hash board to identify any potential issues or malfunctions quickly and efficiently before they happen.

Power Circuit Considerations for Single Board Testing

Power Circuit Considerations for Single Board Testing are essential for ensuring safe and effective repairs on Antminer S17 hash boards. The power supply voltage for each board should be 18.5V, which is distributed into 12 voltage domains with a voltage of 1.55V between every two domains. When performing single-board tests, it is essential to have the correct amount of cooling present, with four fans necessary when testing partners. It is also essential to change the repair mode under the fixture config file to 1 if the miner needs to be tested in a software-free state to prevent any EEPROM data from being erased during testing. Furthermore, all tools and equipment used during testing should be thoroughly inspected beforehand to ensure they are free of defects and function correctly to ensure successful and accurate results. All safety measures should also be taken when performing tests, such as wearing protective gloves or eyewear while handling electronics and ensuring that all appliances are properly grounded before powering them up. Finally, always follow the instructions provided by Bitmain in their service manual when conducting maintenance on their product, as it provides detailed information about repairs and troubleshooting for various faults.

Step-by-Step Guide to Repairing an Antminer S17 Hash Board

Repairing an Antminer S17 hash board can be a daunting task for those unfamiliar with the process. But with the right tools and knowledge, it doesn’t have to be so intimidating. This step-by-step guide will walk you through all the steps necessary to repair your Antminer S17 hash board, from gathering the necessary supplies to troubleshooting and testing each component. With this comprehensive guide, you’ll have your machine up and running in no time!

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Tips and Tricks for a Successful Repair Job

Whether you are a beginner or an experienced technician, some specific tips and tricks can help ensure a successful repair job when repairing an Antminer S17 hash board. From gathering the necessary supplies to troubleshooting and testing each component, this guide will provide helpful advice for achieving optimal results. Additionally, it is essential to have the right tools on hand, such as general electric screwdrivers, multimeters and tweezers, to diagnose any issues with the board properly. Furthermore, heat dissipation should be considered if parts of the board need to be tested separately; using four fans can help cool down any overheating components during repairs. Finally, setting the miner’s software configuration file correctly before running tests will ensure all operations run smoothly without damaging other components on the hash board.

Examining Voltage Between 12 Voltage Domains

Examining the voltage between the 12 voltage domains is a critical step in validating a hash board. This involves measuring the voltage at each domain and comparing it to the expected value given by the manufacturer. The process should be repeated for each domain, ensuring that all of them are within normal operating parameters. During this examination, any variation should be noted and investigated immediately, as it could indicate an issue with an individual component or a more significant system-wide problem.

Additionally, it’s essential to look for signs of wear in electrolytic capacitors as these components are prone to degradation over time due to their high internal resistance. To do this, use a multimeter on its lowest settings and check for any signs of leakage or excessive load current on the DC lines. The presence of either can be indicative of a failed capacitor. Furthermore, check for continuity between the positive and negative poles on each capacitor; if there is no continuity, it needs to be replaced.

When examining the 12 voltages domains, attention should also be paid to any indicators of possible shorts or grounds that may have developed from component failure or environmental factors such as vibration. If any irregularities are identified, they must be corrected as soon as possible to maintain the proper operation of the board systems. Finally, regular monitoring of these voltage domains is recommended to ensure consistent performance over time and identify any potential issues before they become too severe and cause damage or loss of data/functionality on the hashboard system.

Analyzing PIC Schematic Diagram and 18.5V Output Control Circuit

Analyzing the PIC Schematic Diagram and 18.5V Output Control Circuit is essential for understanding how to troubleshoot the S17 hash board when a fault is detected. When testing the fixture, J6-J7 should have a voltage of 18.5V. To ensure that all twelve voltage domains are working correctly, it is necessary to check that the ordinary working voltage of the four pins of Q7Q8Q9Q11 is 0V and that a voltage of 3.3V is present at pin 1 of Q10. If not, it could indicate an issue with the U3-PIC losing firmware or not being powered correctly.

The 1.8V power supply circuit is obtained through voltage division by the voltage domain and then supplied with power to LDO 1 pin, which in turn will output 1.8V at pin 5 (each voltage domain having one 1.8V LDO supplying power for the chip). Measuring resistance over the ground when power has been cut off can be used to compare values between boards to see if any abnormalities are present, and if none are found, then it could point towards an issue with a chip itself – welding removed chips onto another good board after soldering can be used to verify this suspicion by checking if RI signal outputs come from them or not.

Similarly, obtaining a 0.8V power supply from each domain’s four chips involves using a divider for access before being sent to its 5-pin LDO for powering two chips at once – ensuring that 3.2 V is present here before checking its solder joints for cold spots or short-circuiting may help resolve any issues arising from this part of the control circuit too. Altogether, a thorough examination of both PIC schematic diagrams and 18.5V output control circuits should provide enough knowledge to be able to spot potential problems with S17 hash boards to fix them quickly and effectively without having to replace components unnecessarily as long as follow-up testing confirms faults lie where they were suspected initially.

Investigating Fault Phenomenon for ASIC=7

Investigating the fault phenomenon for ASIC=7 requires a thorough understanding of the 0.8V power supply circuit and its components. The 0.8V power supply is obtained by the voltage domain divider, with every two chips among the four chips of each domain in an S17 hash board providing a 0.8V LDO power supply and every LDO supplying two chips. If there is no voltage output from this circuit, it’s necessary to check whether the 0.8V LDO has a supply voltage of about 3.2V or is cold-soldered or short-circuited. If there is a 0.8V output, then one needs to measure the resistance value over the ground at the chip test point after powering off to compare with that on an OK board and determine if any abnormality exists to identify potential faults in individual chips, which may be causing issues with ASIC=7 performance overall.

Examining 0.8v Power Supply Scheme and LDO Power Supply Voltages

When examining the 0.8V power supply scheme and LDO power supply voltages, it is essential to measure the voltage of the 7th chip U198-CLK-RST-CO to check if the power supply is regular. If CLK does not have a voltage of 0.8V, then you should check the power supply circuit of CLK. The 0.8V power supply circuit is obtained by dividing up the voltage domain and then supplying it through an LDO with its 5-pin outputting 0.8V. It is essential to ensure that every two chips among the four chips of each domain of S17 can provide an LDO with a 0.8V power supply and that each LDO supplies two chips. Additionally, it is necessary to check whether the 0.8V LDO power supply has a supply voltage of around 3.2V; if not, that could indicate cold solder joint or short-circuiting problems. Suppose there is a 0.8V output but no RI signal from any chip found during single-board testing. In that case, it indicates that there might be resistance abnormality in one or more chips, so measuring their resistance over the ground will prove helpful in determining which ones may be damaged and require replacing.

Conclusion

In conclusion, when investigating fault phenomena, it is essential to understand the 0.8V power supply circuit and its components to identify any potential issues with S17 hash boards. Measuring the voltage levels of each chip on the board, as well as examining resistance values over the ground after power has been cut off, can help narrow down potential problems that could be causing performance issues overall. Additionally, checking whether 0.8V LDO has a supply voltage of around 3.2V before testing solder joints for cold spots or short-circuiting may also prove helpful in resolving any faults found within this part of the control circuit. With these principles applied correctly, you should be able to troubleshoot effectively and efficiently without replacing unnecessary components due to faulty diagnosis.

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Disclaimer: The information provided on this blog is for informational purposes only and should not be taken as any form of advice.

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