I have an original B/W AFM and an MMR LE. I've always felt my MMR doesn't play the same as the original MM. I've also played several examples of AFM the new AFMr and don't think the shots feel the same on the the remake. I've never been able to put my finger on it but I know several people who felt the timing was off. I decided to investigate this this afternoon. Here is what I did. I have a two channel oscilloscope (Fluke Scopemeter 123). I put channel A on the opto board for the right flipper (SW1 and ground). I put channel B on the on the right flipper coil (see pics). I triggered off channel A so I could see the timing between when the flipper button was pressed and the coil was energized could be precisely determined.
On MMR I flipped 33 times. The shortest time was 1.5 ms, the longest was 4.5 ms. The mean ± SD was 3.4 ± 1.3 ms.
On the original AFM the flipper delay was to the degree I was able to measure it zero. It was 0 ms on the ms time scale and also 0 on the microsecond (µs, 1/1,000,000 of a second) scale.
So in short: When you press the flipper button on a remake there is a variable delay until the flipper coil fires. On the original there is no delay.
EDIT: Everything I originally said is correct. But it was pointed out that I actually measured the voltage difference between the power and hold coil. The latency issue remains the same as described here but I repeated the analysis using the ground and power leads of the coil. See post # 172.
EDIT: I repeated the measurements on the AFM using a method @cgc_dougs suggested. Using this method I found the AFM also has a variable delay of 0.5 to 4.5 ms. I'm not not sure why in these original tracings it looks like there is no delay on the AFM. The coil draws enough power to create an artifact in the opto board signal which creates an artifact synchronous with the coil firing. It may also have been a grounding problem.