Open ok1djo opened 1 year ago
The schematic fragment has been taken from the MD-380 documents, and in the UV380 they just "rotated" the pin mapping of U103 while keeping the same functionalities of the overall circuit. I'll update the image for better clarity.
There are probably swapped A and B part of dual Op Amp U103 in schematic describing HW changes of MD-UV380 here https://github.com/OpenRTX/openrtx.github.io/blob/master/M17/mduv380_mods.md. The schematic do not actually correspond the photos of changes, according the schematic, the removed parts shall be on the right upper part of U103, because there is a Pin 1. It might confuse newcommers and also those, who are into mod od MD-2017 which shall be close enough to 380's, but the board's design is different, so hard to compare. Hence most probable source of confusion is just swap of A and B part of U103 Op Amp in schematic.