That's what we want, a Low on pin 13. Now to get a Low on Pin 12...
Pin 12 is fed from the inverted output of an AND gate, so both inputs must be Hi. One side is from an [Comparator]op amp reading the temperature sensor, and with TP217 reading as you measured, then that half is good. i just haven't had time to sort thru all the traces for the other half of the AND gate.
So i've spent several hours this evening scraping off the coating and tracing back and forth with all the tiny vias and traces, and i'm still not close to finding any real signal yet, it's never ending gates. The one half- AND gate has split into 4 more AND gates, so it's going to take quite a bit of time to ring this out. i've got to give my eyes a rest.
Last edited by kiev
on Mon Nov 09, 2020 7:24 am, edited 1 time in total.
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