Antminer Z15 BM1746AA ASIC chip replacement tutorial

The Bitmain Antminer BM1746 BM1746AA ASIC chip is designed to replace damaged Z15 hash board chips. It is a high-performance mining chip specifically designed for the EquiHash algorithm, renowned for its high hash rate and low energy consumption, making the Antminer Z15 excel in mining cryptocurrencies like ZEC. Each hash board on the Antminer Z15 contains only three BM1746AA chips, each controlled by an individual power management IC.

A faulty ASIC chip on the Antminer Z15 hash board can lead to reduced hash rate, decreased mining efficiency, increased energy consumption ratio, and compromised stability, potentially halting the miner's operation and impacting profitability.

Steps for quick replacement of the BM1746AA ASIC chip:

1. Power off the miner completely and disconnect all power sources to ensure safe operation.

2. Disassemble the protective case from the side of the Antminer Z15 without the fan. Use a screwdriver to unscrew the bolts on the protective mesh and remove the grid. Detach the protective case, conductive copper sheets, and other connecting wires from the top control board, then extract the hash board.

3. Allow the hash board to cool down, then disassemble the heat sink and clean the dust on the hash board using a specialized cleaning tool.

4. Locate the damaged ASIC chip and evenly apply flux around its pins.

5. Utilize a BGA desoldering station to precisely heat the faulty chip until the solder melts, then remove the chip.

6. Cool the hash board with a cooling fan and clean residual solder with a circuit board cleaning solution.

7. Tin the new BM1746AA chip, align its pins with the solder pads, and secure it to the hash board. Pre-treat with flux, then use the BGA desoldering station to evenly heat until the chip pins are firmly soldered.

8. Repeat the cooling process for the hash board and inspect the chip to ensure stable installation.

9. Use professional tools to check the solder joints of the new chip to ensure there are no weak solders or short circuits.

10. Reinstall the hash board into the miner box, secure all components, and reconnect the cables.

11. Power on the miner and test the working condition of the new chip.

Replacing the BM1746AA ASIC chip in an Antminer Z15 can help miners restore or enhance their hash rate, improve mining efficiency, extend the miner's lifespan, and maintain market competitiveness. These advantages are crucial for miners to ensure better earnings and returns in the cryptocurrency mining industry.