?Roman,
the problem is "hi RX current".
The diagnostics3.pdf was made when transmitting. Why transmitting?
" I found that D108 is broken"
At the old or at the new board?
This means VCC (5 V) was higher than around 5.6 V!
Look at the circuit diagram at the end of the .
"The second 3.3V SMPS board on the VDD terminal should have 3.3V, I measured 3.05V."
Where?
Could you check voltages on both sides of D103 (see circui diagram) and voltage across D103?
73, Ludwig
