ISO electronic board :
This interface is down, the green ISO LED does not light up ! !
Looking for a bit more meadows, using a multimeter we can see that the ISO LED is controlled
directly from microprocessor on CAN electronic board via component and 2×35 points connector. So I redid the welds of
Another point on the CAN electronic board at the voltage converter 3.3Vdc -> 5Vdc ( LTC1871 ),we found a power MOSFET
in case SOIC8 . I guess it is a FDS7760A following the LTC1871 datasheet (the reference of the component being buffed ! ) Here:
This component is cooled through the ground plane ! This is why it is slightly over- high.
Moreover, a drain tabs ( in this case the pin5 ) is not welded ? ?
So I resoldered this component properly, taking care of the well -plated to ensure contact with the runway under
After a test table with a 12Vdc power supply, again, the green ISO LED on CAN CLIP lights up.