PaperTRW posted:George,
I'm not in a great position to grab my notes at the moment, but here are a few thoughts off the top of my head:
1) You didn't mention that you wired an antenna to the LCRU. If you didn't, it might cause the behavior you describe of no TMCC operation. I hooked the antenna wire to the chassis ground, then to the hot (center roller) lead - same result. Then I swapped the transformer leads since I "rediscovered" that the 1033 is supposed to be wired A to outer rail, U to middle rail, plus I swapped the antenna lead again. All possible combos with the same result.
2) I THINK that's normal behavior for the smoke output in neutral. In order to prevent cooking the smoke element in neutral, the output was pulsed. (These LCRU1 boards were pre-fan-driven smoke units.) Exactly what I suspected, but didn't want to "lead" the response - thanks!
3) Didn't I get you an extra PIC chip for these boards already? You know, I forgot about that, but yes, you did! It's the two-broken-leg chip (nice soldering BTW) and it's the one that at least provides conventional operation. Now that I know you had already tested the chip, that kind of points me in a different direction. Unfortunately I'm at a bit of a loss on where to look next. I'm missing something....
