a printer oddity
Roy J. Tellason
rtellason at verizon.net
Fri Apr 11 14:58:13 CDT 2008
Some of you may already be aware that I have a whole pile of dot-matrix
printers kicking around (http://mysite.verizon.net/rtellason/w4s.html has a
list of them on there), and in moving some of them yesterday I noticed some
rather odd things about one of them.
It's an Okidata 391, one of the few that are wide-carriage, and it's 24-pin
as well. Where before I'd had most of them facing front-outwards I now have
this one sitting there with the rear facing where I can see it, and have
noticed a couple of odd things:
First is that right next to the usual parallel connection there's another
connector, a DB25. That bit seems to be a little loose, and I'm thinking
plug-in board maybe? Something's not quite right. Anyhow, I was wondering
if this was a serial interface adapter, and if it might be usable in any of
the other units I have on hand as well. I have, unfortunately, no
documentation on any of these at the present time.
The other thing is that attached to that connector is a little adapter, which
has an RJ-45 socket on the back side of it. The plug side of it has only a
small number of the 25 pins actually installed. If I can figure out a way to
pop the shell open maybe I'll trace it out, otherwise I'll probably take the
ohmmeter approach. :-)
Was it at all common to use these for serial connections?
Anybody have docs on those 300-series Okidata printers?
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, a critter that can
be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters"
Information is more dangerous than cannon to a society ruled by lies. --James
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