Innosilicon T2T model hash board repair guide

Innosilicon T2T model hash board maintenance manual (V1.3)

In the process of manufacturing and using the miner, if the user encounters chain loss, low hashrate, multiple hardware errors, etc., please refer to this manual for test and maintenance.

Note: This manual cannot cover all possible abnormal problems. If you encounter a problem that cannot be solved using this manual, please consult our relevant personnel, and they will update this manual when necessary.

Ⅰ. Overview

1. The circuit layout of the hash board and the distribution of test points

Take 3*31 model as an example. For other models, please refer to relevant design documents.

(1) The three adjacent chips in the figure are a voltage domain [(1,2,3), (4,5,6)...(91,92,93)]. There are a total of 31 voltage domains on this hash board, and the voltages of the three chips in each voltage domain are the same, and the average voltage of each voltage domain is about 0.45V at startup (T series machines)

(2) The red arrow in the figure shows the transmission direction of CLK and communication signals;

(3) There are 1 to 7 test points between each two chips (each model is different, please refer to the design file for details); test points 1 to 7 are CLK, RST, EN, SCK, CS, DI and DO signals respectively. Specifically as shown below:

(4) Test points and connections between adjacent chips:

2. Description of the test software

3. Error code list of test software before and after pasting

If no problem is detected, "√" will be printed at the end of the log, otherwise it will be printed "×"。 When a problem is detected, the software will report the error type with the highest priority. The order of error priority is: E0>E9>E6>E4>E7>E5>

E3 > E1 > E2 > E8. The chip can be repaired or replaced according to the report.

4. Error code list of aging software

II. Preparation of maintenance platform

Tools：serial port board / data cable / TF card / jumper cap / oscilloscope / multimeter

Software：

boot.bin

SecureCRT.exe

1. Software instructions

(1) Instructions for the test software *. bin

How to use: After shutting down, copy xxx.bin directly to the TF card, and insert the TF card into the slot of the serial port board. Then connect the serial port board to the control board, and use a jumper cap to connect to the J2 interface. Finally, boot it up.

(2) Instructions for the the serial port tool

Install the serial port test tool (SecureCRT.exe) on the computer, and set the baud rate: 115200, n, 8, 1.

The setting method is as follows:

Double-click the serial port icon to open the serial port tool as shown in the figure below, click "New Dialogue" in the red box in the dialog box.

Select the serial in the New Session Wizard.

Set baud rate: 115200 and other options.

(3) Software instructions

① Software before and after pasting

The usage process is:

1) After inserting the SD card into the slot, check that the device is correct and power on.

2) Open the serial port software to check whether the software version information is correct after power-on.

3) During the test, the test information of each stage and other prompt characters will be displayed to facilitate hardware testing and status monitoring.

4) After the test is finished, print the test result. If it is a multi-chain test, the test results will be printed together after the test is finished.

5) To test again, directly press the reset key on the control board or press the enter key according to the prompt characters of the software.

② Maintenance software

1) After inserting the SD card into the slot, check that the device is correct and power on.

2) Open the serial port software to check whether the version information of the software is correct after power-on.

3) During the test, the test information and LED lights of each stage will be displayed to facilitate hardware testing and status monitoring.

4) The software will continuously send a fixed command during operation, which can be used to measure voltage and signal.

5) After the measurement is completed, press the function key to continue running, and finally print the test results.

6) To test again, directly press the reset button on the control board or press the Enter button according to the characters prompted by the software.

It should be noted that the maintenance software can only test one circuit board at a time. When the function key is pressed, only when the corresponding indicator light goes out can it be ensured that the key is successfully captured.

2. Establish a test environment

Take out the control board of the miner to be tested, place the control board and the serial port board as shown in the figure, insert the TF card, and insert the jumper cap into the J2 interface. Connect the serial port board and the computer with a data cable.

III. Maintenance process

1. The basic process of repairing the aging of the whole miner

(1) Reproduce the bad aging problem and record the error code. If you need our company's research and development analysis, you also need to save the aging log.

(2) Check whether the power output corresponding to the defective board is normal.

(3) If it is a multi-channel control power supply, exchange the power channel of the bad board and the normal board (note that the order of the data line interface is adjusted at the same time), and then observe whether the bad phenomenon follows the hash board or the power supply. If it follows the power supply, replace the power supply again. do aging.

(4) Disconnect the power supply and network cable. Check whether the appearance of the machine is damaged. Check whether the power and data cables are loose or disconnected.

(5) Use the original machine power supply and the faulty hash board to do a sticky test in the bucket, and record the error code and log. If there is no abnormality after 5 consecutive tests, our R&D personnel will be notified for analysis.

(6) Use the original machine power supply and the faulty hash board, and do a post-stick test outside the barrel to see if the phenomenon still exists and make a record. If the chip surface is a heat sink fixed by screws, remove the heat sink on the chip surface, and then do a pre-stick test to see if the phenomenon still exists, and make a record.

(7) Continue to analyze in accordance with the faulty board repair process.

2. The basic process of repairing the single board

Before maintenance, please confirm that the power supply, control board, and various cables are connected properly.

(1) Use the pre-glue test software to test and get the error code Ex:x. Different next steps may be taken for different types of errors.

(2) Check the appearance of the board, and observe whether there are missing components, errors, or abnormal appearance. Check whether there are solder balls, foreign objects, etc. near the error chip.

(3) Run the maintenance procedure and check the input voltage with a multimeter. Check crystal oscillator supply. Check tail IO boost circuit. Check the LDO output of each stage.

(4) Use an oscilloscope to check the chip input and output signals CLK, SCK, DO, DI, CS, RSTN, START.

(5) If the output signal of the ASIC chip is found to be abnormal, do not easily replace the chip. According to the instructions in the following chapters, first try methods such as adding soldering, re-soldering, and swapping with other chips on this board.

(6) If the method of chip exchange is adopted, it can be observed whether the problem follows the chip.

(7) If the above method is invalid, then replace the chip. It is necessary to record in detail the specified information such as the cause of the problem of the removed chip in the maintenance report. Regularly send the maintenance report to our company for analysis.

3. Locate the broken chain with a maintenance-specific program

Copy the provided repair.bin to the TF card and plug it into the serial board. Connect power and data cables (no fan required), power on. According to the error message of the software before or after gluing, detect the test points of the relevant chip and its adjacent chips.

Description of function keys and indicators in the service software.

(1) After power on, the lights on the control board are on (red and green lights next to the reset button). If the power-on link is broken, the software will keep sending cmd04. After pressing the function key next to the USB card slot, the software will stop sending cmd04, and the program will continue to run, and the green light will be off at this time;

(2) If the power-on link is connected, the software will continue to send cmd04. Similarly, after pressing the function key, it will stop sending cmd04, and then the green light will go out;

(3) After the frequency configuration fails, the software will send cmd04 at the point of failure, press the function key, stop sending cmd04, the program continues to run, and the red light is off at this time;

(4) After the frequency configuration is successful, if the link breaks during the continuous reading process, the software will send cmd04 at the link break. After pressing the function key, the transmission will stop, and the red light will be off at the same time, and the program will continue to execute.

IV. Analysis of typical problems

1. E0: 1

This kind of problem is that the communication chain is completely broken, and most of them are caused by abnormal peripheral circuits. Known causes are:

(1) The power supply has no output or the output is abnormal.

(2) The solder connection between the communication interface and the plug-in pin is shorted.

(3) The data cable is not plugged in properly or the contact is poor or damaged, resulting in a short circuit.

(4) The components between the communication interface and the first chip have problems such as false soldering, short circuit, burning, displacement, and missing parts.

(5) The IO of the first chip was damaged by static electricity.

(6) The crystal oscillator is abnormal.

(7) Some components are missing.

If you encounter such problems, you need to follow the "5 Checklist" for a complete inspection.

2. E0: N

The problem is that part of the communication link is broken, and it is broken at the Nth chip. Known causes are:

(1) The signal between the Nth and N-1th ASIC chips is abnormal, the pins of the two chips are falsely soldered, floating high, short-circuited, and IO is damaged.

(2) False soldering, short circuit, burning, displacement, missing parts and other problems occur in the peripheral components of the Nth chip.

Repair steps:

(1) Check the peripheral circuit, if there is no abnormality, go to the next step.

(2) Check the ground resistance of the IO of the Nth ASIC chip and the front and rear ASIC chips. If there is no abnormality, proceed to the next step. If there is any abnormality, remove the chip and compare it with the ground resistance of the IO of the new chip. If there is no obvious difference, go to the next step, otherwise replace the chip.

(3) Re-solder the Nth and N-1th chips, if there is still an abnormality, go to the next step.

(4) In other cases, it is necessary to use a maintenance-specific program to assist in positioning. Check the chip when software executes to "Start to send cmd04 endlessly". At this time, you need to use a multimeter to measure the voltage of the abnormal chip (the measurement method is as shown in the figure below). And use an oscilloscope to measure the signals of the Nth chip and the N-1th chip. As shown in Figure 14, if the DO/CS/SCK output by the N-1 chip is abnormal (it can be compared with the normal waveform of the chip before the N-1th chip, if the waveform is inconsistent, it is abnormal), then replace the N- 1 chip. If the output of the Nth chip is abnormal, replace the Nth chip. If the output of the Nth chip is normal, but the input DI is abnormal, then replace the N+1th chip.

3. E6: N

The voltage of the Nth chip is abnormal.

Maintenance method:

(1) Use a multimeter to confirm whether the voltage of the chip is abnormal. If the voltage of the chip is too low, detect the SCK signal of the test points of the three chips of this level, and compare the chip with the SCK frequency jitter with other chips of different levels with higher voltage division. Swap. If the SCK signals are normal, replace chip N with other chips of different levels with higher voltage division.

(2) If the problem is with the chip, replace the chip.

4. E7: 0

When E7:0 appears, you need to use maintenance software to locate the problem location, the location method is the same as E0, and test when the program runs to "CRITICAL PLL CONFIGURE ERROR on Board 0 !!! Begin to Check SPI ... "

5. E7: N

Indicates that the chip N does not respond, and you need to replace the chip. The checking method is the same as E0:N.

6. E1: N

 The Nth chip lacks a core. If this problem occurs in a large area, submit it to our company for research and development analysis. If only a few hash boards have such problems, replace chip N.

7. E2

The total number of cores on the board is insufficient. At this time, it is necessary to check whether the total voltage of the circuit board is abnormal (refer to the method in E0 error), and if there is no abnormality, it needs to be returned to the factory for repair.

8. E3: N

The softbist error rate of the Nth chip is high. The method is the same as E1:N.

9. E4: N

The pll of the Nth chip is not locked. Check the output CLK of the N-1th chip. If there is no abnormality, resolder the N-1th and Nth chips. If it still can't be solved, replace the Nth chip.

10. E5: N

The temperature of the Nth chip exceeds the standard, replace the chip. If the problem occurs over a large area, you need to check the heat sink. If the problem still cannot be solved, it needs to be returned to the factory.

11. E8

The temperature of the Nth chip exceeds the standard, replace the chip. If the problem occurs over a large area, you need to check the heat sink. If the problem still cannot be solved, it needs to be returned to the factory.

The softbist error rate of the whole board is high, you need to check whether the board voltage and the clock of each chip are abnormal. If abnormal, replace the abnormal chip

If there is no abnormality, it needs to be returned to the factory.。

Ⅴ. Checklist

This checklist is for maintenance reference.