FNKM09KPFCT module for APW11 PSU

Product description

The FNKM09KPFCT is a core voltage control module specifically designed for the Bitmain APW111721c water-cooled mining rig power supply. As the main control unit for power supply voltage regulation and feedback, it directly acquires the output voltage signal and operational parameters for voltage regulation and works with the power supply MCU to achieve precise voltage regulation of the main output channel. It is a key component for the APW11 power supply to achieve a wide adjustable output range of 17V–21.6V.

The module is compatible with APW11 Hydro power supplies. Replacing a damaged voltage regulation unit can repair common faults such as unstable power supply voltage, inability to regulate voltage, voltage drop under full load, and power-on protection shutdown. It is widely used for repairing and replacing original Antminer Hydro mining rigs' compatible APW11 power supplies.

FNKM09KPFCT PSU voltage stabilizer module compatible models:

Compatible PSU: Bitmain APW111721c water-cooled power supply

Compatible miners: S21XP Hydro, S19 Hydro series water-cooled ASIC miners

Replacement scenario: Repair and replacement of original FNKM09KPFCT modules due to aging, burnout, pin desoldering, or voltage regulation failure

FNKM09KPFCT voltage control module repair effect:

Replacing this module can solve the following APW11 power supply faults:

1. The power supply cannot adjust the output voltage, resulting in a fixed low/high voltage output;

2. The voltage drops significantly under full hashrate, causing frequent disconnections and hashrate reductions in the mining machine;

3. Overvoltage/undervoltage protection is reported immediately upon power-on, preventing the power supply from starting normally;

4. Excessive output voltage ripple, causing abnormal heating of the hashrate board chips;

5. Communication voltage regulation failure, with no response when modifying voltage parameters in the background.

How do I replace the FNKM09KPFCT voltage regulation control module?

Before opening the chassis, disconnect the APW11 power supply and discharge the energy stored in the power capacitors. Wear an anti-static wrist strap and use an anti-static work mat when handling the FNKM09KPFCT. Use a controlled low-temperature SMD hot-air rework process to desolder the faulty module, clean the pads with flux and desoldering wick, align Pin 1 of the new module, and solder it in place.

Post-replacement verification: Power the unit using a variable transformer and gradually increase the load while monitoring the main output rail. Confirm that the output voltage responds correctly to control panel commands across the 17V to 21.6V range, remains stable at full hash rate, and triggers no over-voltage or under-voltage protection events. The repair is complete if the output rail functions correctly and the miner achieves the expected hash rate.

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Related product:

Antminer APW11 PSU