TiN -> Doh!
Next time I come by Florida, I'll buy you any drink you want
I mean, there is not zero chance that I could spent days of debugging instead of popping that jumper in, as I'd rather think about some complicated problem on component level, instead of checking multiple photos of other 3458A boards I saved on drive all these years...
Measuring +10.0006 VDC from SMU:
Ohms mode
DCI ranges 10nA, 100nA, 1uA, 10uA, 100uA showin zero, no matter what current supplied into meter. So those ranges are broken. That cause self-test fail on value 95 as well.
DCI ranges 1mA and up are fine.
True people say - one set of eyes is good, but fresh eye always better
So happy now.
Video with Self-test, ACAL attempt and some tests.
Firmware 9.2 is in the unit.
Current range should be relatively easy fix from now on. I'll leave it for tomorrow...
P.S. As much as 3458A awesome in terms of performance, I think that's much it's HORRID in front-panel operation. I used it for two days, but already hate it.
I mean really, it's hard to remember all those paths and combinations. I understand the target group of 9500$USD multimeter, but still. Now I completely understand why instrument like Keithley 7510 would be much better choice for bench use, if one does not need performance of 3458A.