Hello,
I have attached a block diagram of the A/D conversion unit. I think that this unit measures the voltages selected by U163
with comparism to the 4 voltages (0 volts (GND), 0,09811V, 1,0320V, 6,95V).
There are some A/D related tests:
Test 100.1 checks the charge - discharge circuit of the integrator formed by U137 and the components around. Measurement input is GND.
Test 100.2 checks the differences between some measurement results.
Test 101.1 does the same as 100.1 , but stores the result.
Test 101.2 does the same as 101.1 , but measurement input is Vref (6,95V nom.)
Test 101.3 checks the difference between 101.1 and 101.2 .
Best regards
EMUD