Differential NBO2 Driver Fix
A wiring error was detected. R401 and R402 should have been attached to the non-inverting inputs of U400 and not the inverting
inputs.
What it should have been.....
The top side trace between the R402 / R403 and R401 / R405 pairs were cut. Two jumpers attach R401 to R406 and R402 to R404.