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Home > Blog > Repair Guide > Innosilicon A11 series Hash Board Repair Manual

Innosilicon A11 series Hash Board Repair Manual

By THANOS MINING August 19th, 2022

Innosilicon A11 series Hash Board Repair Guide

Thanos mining has updated the latest Innosilica A11 series mining machine maintenance guide manual to help maintenance personnel quickly troubleshoot and repair the failure of the A11 series mining machine hash board, reducing the time for maintenance departments to troubleshoot.

1. Introduction of Innosilicon A11 series

A11 series miner is different from other miners, its combination is different, please refer to the following figure:

1. The hash board from left to right is hash board 1---hash board 4;

2. There is no SPI line, the A11 series control board and the computing power board are connected through the adapter board.

The DDR chips of the A11 series will vary depending on the version (brand, particle capacity). Different memory chips cannot be mixed, and each model cannot be assembled at will!
It mainly includes the following 6 types:
A11 Samsung particle, there are 8G and 16G;
A11M Magnesium Particles, 16G;
A11MX Magnesium Particles, 8G;
A8P is equivalent to A11
A8PM is equivalent to A11M
A8PMX is equivalent to A11MX

Mixing hash boards/hash modules is not recommended until you understand the machine properties.
The premise of assembling the computing power board / computing power module is that the SN code information pasted on the shell of the entire mining machine is consistent.

There are two types of SN code information:
RA51: such as RA51A21A2400441
RB51: such as RB51XN21C090704

Mutual assembly principle of RB51 SN code:
1. Can be directly assembled with each other;

Mutual assembly principle of RA51 SN code:
The sixth digit of the SN code must be the same;
2. All are AG or all are BG;
3. A11M mining machine, 21 and 22 can not be mixed (see SN code 7 and 8).

II. Create a maintenance platform

The maintenance platform for repairing the A11 computing power board needs to use the A11 main control board (test board) to program the maintenance program (the maintenance program is divided into Samsung RA51 and Micron RB51, each repair station is equipped with 2 to suit different types), and a single module The power supply board tested, or the power supply board of the A11 itself, use the power supply of the A11 itself or a 12V constant voltage power supply. The maintenance platform is constructed as follows:

Ⅲ. Troubleshooting of faulty miners

Taking the maintenance of the faulty miner as an example, the repair steps are as follows:

1. Before powering on, you need to use the buzzer gear of the Fluke Multimeter 15B+ to detect whether there is a short circuit fault at the power supply end of the hash board;

2. If there is a short circuit in the hash board, you need to disconnect the hash board and the power supply, measure the hash board separately, and find the short-circuited hash board;

3. First observe whether the appearance of the short-circuit hash board is defective, and then remove each hash board module one by one until the short-circuit hash board module is found;

4. If there is no short circuit, you can power on the whole miner, plug in the internet cable, scan the miner operation status and error information (refer to the picture below for the error code), and locate the faulty hash board;

5. Shut down the miner, take out the faulty hash board, visually inspect and locate the faulty hash board module, or test the faulty hash board by using the repair platform / using the barrel + test control board (refer to the figure below) (the method is similar to the repair of T3 + hash board), according to the error message from the repair platform, remove the faulty hash module and prepare for maintenance.

Error code	Error type	Corresponds to the original error	Illustrate	Judgment basis	Repair advice
E0	Visual inspection abnormality	F15	Other	Other abnormal
E1	Visual inspection abnormality	F1	Power supply abnormal	The control board and fan are not powered after the miner is power on
E2	Visual inspection abnormality	F7/F8/F12	Control board abnormal	1. Unable to burn 2. The Normal indicator on the control board does not flash after startup 3. The network port light does not flash after startup 4. IPSET button is invalid 5. Other control board failures
E3	Visual inspection abnormality	F2	Network cannot be connected	Miner cannot report IP
E4	Visual inspection abnormality	F3	Aging system does not show	Corresponding SLOT is not displayed on the aging system page
21	Miner error code	21	1 or more hashboards not detected	Error code is displayed in the ErrCode column of the aging system
22	Miner error code	22	The I2C communication of power supply is abnormal	Error code is displayed in the ErrCode column of the aging system
23	Miner error code	23	All hash boards' SPI chains fail	Error code is displayed in the ErrCode column of the aging system
24	Miner error code	24	The SPI chain of some hash boards fail	Error code is displayed in the ErrCode column of the aging system	Overhaul craft, SPI cable, etc.
25	Miner error code	25	Overclocking failed	Error code is displayed in the ErrCode column of the aging system
26	Miner error code	26	Failed to set voltage	Error code is displayed in the ErrCode column of the aging system	A11 report 26 is SPI communication problem
27	Miner error code	27	bist failed	Error code is displayed in the ErrCode column of the aging system
28	Miner error code	28	SPI error at runtime and no automatic recovery	Error code is displayed in the ErrCode column of the aging system
29	Miner error code	29	Error in I2C communication at runtime and no automatic recovery	Error code is displayed in the ErrCode column of the aging system
30	Miner error code	30	Connection to the mining pool is interrupted	Error code is displayed in the ErrCode column of the aging system
31	Miner error code	31	Damage to individual chips leads to inflated hashrate	Error code is displayed in the ErrCode column of the aging system
32	Miner error code	32	Temperature is too high	Error code is displayed in the ErrCode column of the aging system
33	Miner error code	33	Failed to read temperature (error in SPI communication during runtime)	Error code is displayed in the ErrCode column of the aging system	A11 series power off and restart is still invalid, replace the control module
34	Miner error code	34	SPI cable connection is abnormal	Error code is displayed in the ErrCode column of the aging system
35	Miner error code	35	Power supply abnormal	Error code is displayed in the ErrCode column of the aging system
36	Miner error code	36	Number of good cores in the chip is abnormal	Error code is displayed in the ErrCode column of the aging system
37	Miner error code	37	Control board's vid type error	Error code is displayed in the ErrCode column of the aging system
40	Miner error code	None	Insufficient power load	Error code is displayed in the ErrCode column of the aging system
41	Miner error code	None	Power supply startup voltage is too low	Error code is displayed in the ErrCode column of the aging system
42	Miner error code	None	Overclocking fails and cannot be automatically recovered	Error code is displayed in the ErrCode column of the aging system
43	Miner error code	None	A certain level of chip voltage is abnormal	Error code is displayed in the ErrCode column of the aging system
44	Miner error code	None	Hash board A/B pressure difference is too high	Error code is displayed in the ErrCode column of the aging system
46	Miner error code	None	Control board test mode on	Error code is displayed in the ErrCode column of the aging system
47	Miner error code	None	Overtemperature protection fails (software defect)	Error code is displayed in the ErrCode column of the aging system
48	Miner error code	None	Local temperature of the hash board is too high	Error code is displayed in the ErrCode column of the aging system
49	Miner error code	None	Power supply model does not match the miner model	Error code is displayed in the ErrCode column of the aging system
50	Miner error code	None	Control board SPI HUB register detection error	Error code is displayed in the ErrCode column of the aging system
51	Miner error code	28	Failed to read voltage after switching to SPI 3M	Error code is displayed in the ErrCode column of the aging system
52	Miner error code	None	Aging frequency parameter is less than 600M	Error code is displayed in the ErrCode column of the aging system
53	Miner error code	None	Aging frequency parameter of a certain chain is abnormal	Error code is displayed in the ErrCode column of the aging system
55	Miner error code	None	A11 GDDR is at low speed	Error code is displayed in the ErrCode column of the aging system
56	Miner error code	None	A11 3G rate configuration failed	Error code is displayed in the ErrCode column of the aging system
57	Miner error code	None	Abnormal power consumption parameters of the power supply	Error code is displayed in the ErrCode column of the aging system
59	Miner error code	None	ddr particle initialization failed	Error code is displayed in the ErrCode column of the aging system	A11 series power off and restart is still invalid, replace the control module
60	Miner error code	None	A11 low frequency to high frequency failed	Error code is displayed in the ErrCode column of the aging system	A11 series power off and restart is still invalid, replace the control module
61	Miner error code	None	A11 Cache calculation error	Error code is displayed in the ErrCode column of the aging system	A11 series power off and restart is still invalid, replace the control module
62	Miner error code	None	A11 dag calculation error	Error code is displayed in the ErrCode column of the aging system	A11 series power off and restart is still invalid, replace the control module
63	Miner error code	None	A11 job calculation error	Error code is displayed in the ErrCode column of the aging system	A11 series power off and restart is still invalid, replace the control module
64	Miner error code	None	Average temperature of GDDR particles > 68℃	Error code is displayed in the ErrCode column of the aging system	Check heat dissipation strips and heat sinks, fans
65	Miner error code	None	ASIC chip temperature＞78℃	Error code is displayed in the ErrCode column of the aging system	Check silicone grease and heat sinks, fans

Ⅳ. Fault location and repair of hash module

1. Clean the dust on the surface and inside of the Hash board module in turn;
2. Visually inspect capacitors, resistors, etc. for corrosion or loss, and repair them in a targeted manner;
3. Use the diode gear of the multimeter to measure the grounding value of the 6 voltage points. Under normal temperature, the grounding value of VDD of the computing power module is not less than 1Ω, the grounding value of VDDQ is not less than 20Ω, and the grounding value of the output terminals of U3/U4/U6/U7 is open circuit (the diode measured in the diode gear is not less than 0.10v, as shown in the right Figure below), otherwise there may be a short circuit, and the short circuit must be eliminated before powering on.

4. After confirming that there is no short circuit, install the hash module to be repaired on the single-module power supply board, power on and test, and measure the output of the 6 voltage points (as shown in the upper left), with the help of the repair test program (refer to the test page below figure) to locate the fault point and carry out maintenance (Note: the hash module cannot be powered on for a long time without a heat sink).

(1) If the chain fails, an error E0 will be reported, followed by the wrong module number. There are 8 hashboard modules on each board as shown in the figure below. The board test locates the specific module problem and removes the module for maintenance. Most of the faults are caused by the failure of the chain, which may be caused by the adapter board or the corrosion of the module. Only the repair of E0 is listed below. Other error codes are not recommended to be repaired by yourself.

(2) Timing diagram of module voltage (referring to which voltage comes first and then which voltage), refer to the following diagram for repair in order to ensure that the voltage is all right.

1. Fauty problem due to corrosion

The common problem of A11 series miners is the failure caused by corrosion. The modules, power boards and adapter boards near the air inlet have a high probability of failure.

Corroded capacitors, resistors, etc. need to be cleaned up, scraped off the oxide layer with a blade, then re-tinned the pads, soldered new components, and coated with the three-anti-glue.The same position of other modules of the air inlet also needs to be checked for corrosion, if necessary, replace the new components, and then apply the three-anti-glue.

(1) The computing power module is corroded and disconnected，The Hash board module has many micro circuits and components. If the operating environment is not good, it is easy to cause corrosion to it, resulting in short circuit or open circuit. This part should be checked first before maintenance.

For a hash board module with corrosion phenomenon, there is a high probability that one or more of the 6 output voltages have problems. Carefully observe the corrosion point or refer to the timing diagram to find the problem point. After finding the disconnection position, refer to the following circuit diagram to jump wire.

2. The adapter board is faulty
The adapter board is also prone to many problems:
For example, the solder of the data socket falls off, and the line is corroded and disconnected.

(3) Poor contact of the adapter board;
When the adapter board and the Hash board are assembled, the position of the pin header cannot be directly seen, and there are many pins, which are prone to deviation. If they are not aligned, the pins are easily deformed and misplaced during installation.
In addition, if it is in a harsh environment for a long time, this part is also easily oxidized, which can lead to failure.

Ⅵ. Precautions

1. The disassembly and installation of the adapter board must be gentle, and brute force should not be used.

When disassembling, you can pry it up little by little near the four corners of the adapter board, and pay attention to protect the pins of the SPI socket of the hash board.

When installing, first put the hash board into the miner barrel, push it to the bottom, and then check whether the pins of the SPI socket of the hash board are bent, make sure that there is no difference in the orientation and spacing of the pins, and finally place the adapter board lightly on the hash board. Just above the SPI socket of the force plate, make a slight adjustment to ensure that the plug pins are aligned with the jacks, and then press the adapter board lightly and firmly to connect the adapter board and the SPI socket in place. After checking that there is no problem with the installation, lock the electrode screws of the hash board;

2. When repairing the hash board or hash module, make sure that each voltage point is not short-circuited to ground before powering on;

3. If the hash module is not equipped with a heat sink, it should not be powered on for a long time to avoid overheating of the main chip and DDR;

4. For the hash module at the air inlet, a gray strip should be installed on the air inlet side, and the common corrosion-prone positions should be coated with three-anti-glue;

5. When testing the module that reports error E0, there is a high probability that the voltage output is abnormal due to corrosion. If the 6 voltage outputs are normal and stable, and the crystal oscillator is working normally, the fault of error E0 still cannot be solved. It is recommended to gather such modules that cannot be handled and send to professional repair center for repair;

6. When repairing a short-circuited module (usually PL1 / PL2 / PL3 is short-circuited to ground), if it is still short-circuited after removing PL1 / 2 / 3, such modules cannot be repaired on site and need to be sent to professional repair center for unified treatment;

7. There are two common types of the hash module: Samsung RA51 and Magnesium RB51. The repair program (referring to the repair-specific control board) must match the hash board / module to be tested, in order to complete the normal test and display the correct test results. If It is only necessary to verify whether the hash board / module to be tested is connected (whether an error E0 is reported), there is no requirement for the repair program, and the model of the miner / chip appears on the test program display page (you can see the monitored temperature and voltage on the page at this time).

8. For the hash module reporting error E3, if the voltage of the 6 voltage points is normal and stable, it can be regarded as a good module, install it as a complete miner and run it on the shelf to see if it can work normally;

9. For the module reporting error E4, focus on checking whether the crystal oscillator output is normal (use the DS1102E Oscilloscope to measure the crystal oscillator output waveform);

10. When the test result shows that the error E21 is reported, it is the power board failure. Check whether the resistor near the socket on the power board is abnormal;

11. Site maintenance point, it is only required to repair the normal faults of the module in question (only the module that reports the error E0 needs to be repaired). For other errors, or faults that cannot be repaired on site, mark the module's error message and send it to the professional repair site for repair.

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Innosilicon A11 series Hash Board Repair Manual