When re-doing the calibration, at the DAC level, I still get only LEDs 1 & 5 On, and no amount of variation of VR6 and VR7 changes a thing, so I still also want to make sure the old MC1408 DAC is still good.
Actually, while searching the archives, a post by Andrew confirms what I found in the datasheets and also the discrepancy between my KLM-367 board and the clone boards which use the newer DAC08-CPZ:
Old board (which probably uses either MC1408 or another old DAC mentioned by Andrew): DAC Pin 1 floats, whereas the applications in the MC1408 datasheet show P1 grounded (yes, I have seen Pin 1 as NC in that datasheet for one version of the DAC, but the applications show ground).
DAC08-CPZ definitely needs a grounded P1 according to its datasheet. Hence, simply plugging DAC08-CPZ in my board would not be good enough: I will have to jumper P2 and P1 for grounding.
Yash