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Edited by Gatito at 2022-2-4 21:38
During the replacement of U7, it turned out that under the case the area between the GND and EN terminals was burnt out, and there were signs of swelling in the lower part of the case. The faulty voltage converter was replaced with hot air using thermal protection of the surrounding elements.
A voltage of 1 volt appeared at the output of the SW. The oscilloscope did not turn on, but the elements described above no longer heat up, except for the U6 Switching Charger with Dynamic Power Pat chip, and the heating is noticeable.
Based on everything, I will wait for the U6 chip to arrive, aka ETA6002E8A
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