Facit N4000 Schematic
ard.p850ug1 at gmail.com
Sat May 9 07:34:39 CDT 2020
On Sat, May 9, 2020 at 1:07 PM Stefan Skoglund <stefan.skoglund at agj.net> wrote:
> tor 2020-04-30 klockan 13:49 +0100 skrev Tony Duell via cctalk:
> > From time to time there are posts here about the Facit N4000 paper
> > tape punch/reader unit. The one that looks like a Facit 4070 with a
> > tape reader on the front (in fact the punch mechanism is much the
> > same
> > as that in the 4070).
> > I have reverse-engineered mine and traced out the schematics. Of
> > course it's one of my hand-drawn ones but I think it's mostly
> > legible.
> > If anyone wants it I am happy to send out a copy (but as ever I'd
> > rather send it out once and have somebody else pass it on)
> > -tony
> When was your punch made in Åtvidaberg ?
I will have to check (and my 4070s)
> According to Tekniska museet (museum of technology) Stockholm, they
> were made between 1968 to 1999.
The Facit 4070 might have been (the first version of the logic board
used DTL I seem to recall) but the N4000 is much later. There's a 6809
microprocessor and a 68701 microcontroller in there.
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