the S9 model board under repair and 1 S9i video board. The procedures are the same for the S9i and T9 models! For the T9 + and L3 ++ models, the signal manipulations are similar! Test checking the correct passage of all chip signals. This must be done when we have all the signals and at the same time have a problem. In many cases, the S9, S9i, T9, L3 ++ models can only be restored in this way. Two videos on S9 boards use this technique with explanations.
1. How to understand which board is faulty in the miner and in which compartment on the board there is a defect.
2. Checking the power of the chips and some reasons that may be in its absence.
3. The location of the chips and domains.
4. The passage of testpoint signals and the method of checking them.
5. All signals are there and at the same time in the "0 asic" log - board repair with explanations.
6. How to identify a defective chip.
