E9 Pro hash board MPQ8648P chip replacing guide

The MPQ8648P chip with M8648P marking is a power management IC located on the E9 PRO hash board. It features over-current protection (OCP), over-voltage protection (OVP), under-voltage protection (UVP), and over-temperature protection (OTP).

The MPQ8648P power management IC plays a crucial role in the E9 PRO hash board for precisely regulating and managing the input voltage of the hash board, ensuring its efficient operation under various working conditions. If it fails, it may directly lead to issues such as abnormal miner operation, power system failure, or overheating, significantly affecting the overall performance and safety of the machine. Therefore, once a chip failure is detected, it should be replaced immediately.

Specific substitution steps for the MPQ8648P chip on the E9 PRO hash board:

1. First, remove the protective cover plate on top of the miner, detach the conductive copper sheets and the outlet cooling fan, unplug the corresponding cables, then place the problematic hash board on an insulated workbench.

2. Remove the heat sinks on the front of the hash board, clean the dust on the board with a dust-removing cloth dipped in circuit board cleaning solution.

3. Locate the faulty power management chip marked M8648P, apply flux around its pins, afterwards heat it with a hot air gun (set to 2 gear fan speed, approximately 400℃) until the solder melts.

4. Carefully remove the faulty chip with tweezers, clear the residue on the solder pad, and then cool the hash board with a cooling fan.

5. Align the pins of the new MPQ8648P chip with the soldering pad to place, then add a small amount of flux for soldering the chip to original place, and press it with tweezers for a few seconds to ensure a secure connection.

6. Cool and clean the hash board, then re-install the heat sinks removed previously.

7. Reassemble the miner and power it on for testing.

Replacing faulty power management ICs promptly can prevent the hash board's circuitry failures from voltage fluctuations, helping miners achieve stable operation and bringing greater economic benefits to mining operators.