Whatsminer M31S M30S M32 series hash board repair guide

[sgssb]

M3x block diagram is the same as the M20S (refer to M20S Repair Guidance). The circuit consists of a group chipset, temperature sensor, boost circuit, memory, and voltage level conversion. The difference is the hash board with 1 pcs of the crystal oscillator; each group LDO supports 2 group * 1.8V & 1 group * 0.8V.
1. General signal transmission direction picture as below:
M31S:

M30S:

2. M3x hash board has a 1PCS crystal oscillator; the signal between the two groups were connected by resistance.

3. Each group's LDO 1.8V support Pin 7 Pin 8 Pin 13 Pin 14 voltage input and 0.9V support Pin 6 Pin 15.

4. 17V boost circuit
As a highlight in red, 17V is for the last 8 groups.


Tips: This 17V is for the last 9 groups based on the hash board version.
5. 3.3V is for temperature sensor and memory
The left arrow refers to the temperature sensor. The right arrow refers to the memory.

6. Voltage level conversion is between 3.3V and 1.8V.

For more details, please check the ZEUS MINING official website.