Whatsminer M31S hash board troubleshooting for LDO powering

The LDO powering circuit is an important part of the Whatsminer M31S hash board. The circuit is mainly composed of some 5-pin chips, each chip outputs 1.8V, and then outputs 0.9V after being divided by two resistors connected in series to ground. LDO 1.8V and 0.9V are supplied to the three ASIC chips in the corresponding domain. This video mainly explains the working principle of LDO1.8V and 0.9V, and how to measure their voltage correctly.

Click To Watch