This firmware is for Innosilicon G1240 version PSU.
After the Innosilicon power supply is repaired, the voltage is still abnormal. We can flash the firmware to solve this problem. When downloading and using this power supply firmware, please confirm whether the code on the Innosilicon psu case is G1240.
This link is a digital file, which can be downloaded for free as a student of the ZMRC mining machine maintenance training course.