20 Mar
2008
20 Mar
'08
2:57 p.m.
Tony and others interested:
A photo of the component side of the board, and one of the back end of
the unit, are available at:
http://yagi.h-net.msu.edu/facit4070/
These images are quite large, about 5 MB each. Forgive the quality;
setting up some kind of copy stand and lights for this kind of work is
I modified an old photographic enlarger into a copy stand. BAsically just
removed the enlarger head (but hept the slider mecanism that goes up and
down the column). The head was fastened to that by a handwheel bolt which
turned out to have a 3/8" BSW thread. Took a it of brass bar, tapped a
3/8" BSW hole in one end and a 1/4" BSW hole in the other. Fixed a short
length of 1/4" BSW studding ito that to screw into the tripod ush of my
camera (Oh, and made a second one with a 3/8" BSW stud on the end for
some of my larger cameras...). I already had a set of copying lights,
which I rewired with a series/parallel switch so as to save the life of
the bulbs when setting up and focussing.
still on the "pending round-tuit" list. But
you should be able to read
the chips, etc.
Thanks, I did take a look. I recognise some of the largeer compoennts as
being similar to those used o nthe parallel-only boards in my 4070s.
I am nor pretty sure that unmarked block of 8 jumpers near the middle of
the board is to set what will bepunched y the Code Holes switch.
I asusme the DB26 _on_ the PCB is for RS232 only, and that the parallel
inteerface comes in on the DB25 on the main chassis, next to the mains
connector. Is there a ridging board in the lower slot? I would think
there should be (since the pins of the latter DB25 only go to the lower
slot) I guess you could put any of the custom interface boards in that
slot as well
-tony