On Sun, Oct 31, 2021 at 6:55 AM Josh Dersch <derschjo at gmail.com> wrote:
  Yes, this matches what the service docs explain,
sounds like the same machine. 
I am pretty sure I have the ICL service manual for this machine. It's
pretty much a 'boardswapper guide' but I can see if it says anything
about aligning the photocells. I do remember it tells you not to
dismantle the hammer bank, something I read _after_ I had stripped and
reassembled it.
 I should have been more clear -- only the top of the finger is missing, the bottom is
still present, so it should in theory be generating proper pulses. 
OK, that should work
 I should see if I can pull the assembly out and clean it, I suppose if the optical
sensors are dirty it'd be a problem. 
 From what I remember the hammer bank/belt pulley unit
comes out quite 
easily. I'd do that first, you will then have better access to
the
photocell unit.
-tony