I've made a mistake on a design, that went into production...
It was built like the drawing on the left, with R702 to 5V and R703 to GND, it should have been backwards... like the drawing on the right.
The thing is... the board passed all the tests, the RS485 communication works fine.
I wan't to know if this difference could result in errors in communication/damage to the circuit if it is left unchanged, or if it's irrelevant.
This board was designed by several people, the desition to add R702 and R703 wasn't mine, and I don't understand why they are there (datasheet for SN75176B doesn't uses them in any case). So a second, and probably more interesting question, would be: why are those resistors there in the first place? What's their function?