At the time, I measured on Pin22&Pin21 of U101.
=> Checked, and I'm getting now: GND1 & GND2: Short(off) and 0V(on);
=> at TP103 (between Pin 22 of U101 and Low Input/Pin21) 0.015V to 0.018V (Input shorted).
Had a quick look at some of the inputs/outputs of U101:
- PIN23: 1.23V (Ref GND2)
- PIN20: 1.138V (Ref GND2)
- PIN19: 1.275V to 1.825V (Ref GND2)
- PIN18: 0.027V to 0.031V (Ref GND2)
What do you mean by "proceed onwards into ADC troubleshooting"? Do I understand it correctly that U101 is the ADC? Can this even be troubleshot further?
- Does it make sense to remove U101 (it is seated in a socket)?
- Should I remove R318?
BTW thanks a lot for your effort, much appreciated
