Avalon 1166 1246 17.5V boost module replacement tutorial

DC-DC boost modules for Avalon A1166 and A1246, the output voltage is a maximum of 17.5V. It has functions such as under-voltage lockout, current limit, and thermal overload protection. It can be used to repair and replace the faulty boost circuit of the A1246 and A1166 hash boards to ensure stable operation.

This step-up module is used to convert the input voltage 14V to 17.5V and output it. When the boost circuit fails, this circuit's output voltage and LDO power supply will be abnormal, causing the hash board to stop operating. Taking Avalon A1246 as an example, if the hash board has no hash rate and the log shows 0 ASIC chips, it may be caused by abnormal voltage of the step up board. Timely replacement of the boost module can quickly resume operation.

Steps to correctly and quickly replace the boost module:

1. Remove the abnormal hash board from the miner box and place it on an anti-static insulating pad.

2. After using circuit board cleaning fluid to clean the dust and impurities on the surface of the hash board, apply an appropriate amount of flux to the pins of the failed step-up module.

3. After preheating the constant temperature heating platform (the temperature is set at about 300°C), place the hash board step-up module area on the platform and heat it until the tin on the pad melts. Use tweezers to gently grasp the boost module and take it out.

4. If the tin on the pad of the boost circuit is insufficient or uneven, we can use a soldering iron and tin removal wire to remove the solder on the pad. Then add an appropriate amount of solder paste and heat it with a soldering iron to evenly fill the pad.

5. Use a cooling fan to cool the hash board to normal temperature, and then use circuit board cleaner to remove the remaining solder residue on the board.

6. Plant tin on the pins of the new 17.5V step-up module, and add flux to the boost module pad of the hash board.

7. After the heating platform reaches the preset temperature, heat the hash board until the solder on the pad melts. Align the new 17.5V boost module with the corresponding pin arrangement on the pad, and continue heating until the solder paste covers the module pins. Use tweezers to lightly press the module for a few seconds to avoid empty soldering.

8. Move the hash board to an anti-static insulating pad and use a cooling fan to cool it, then use circuit board cleaner to clean the remaining solder slag on the board.

9. Use multimeter to check the voltage output of the hash board boost circuit. If the output is normal, the step-up module has been replaced successfully.

10. Put the hash board back into the miner box, power on the whole machine and run the test.

Prolonged operation of the Avalon miner may cause damage or performance degradation to the internal electronic components of the miner. Timely replacement of failed components can reduce downtime losses caused by failures and ensure the normal profitability of miners.