birs23 at zeelandnet.nl
Mon Jul 11 15:47:06 CDT 2005
I just hooked up my Teleprint 390 to my laptop and it works like a
charm, almost 100%. I can type on my laptop and the output appears on
both the papertape as typed. And what I type on the Teleprint appears
on my laptop but what it doesn't do is when I feed it a papertape
output it on the laptop (only parts). It does output it correctly on
the Teleprint itself. Any idea's what might be wrong here ?
I am not a real technical person but willing to give anything a try :-)
At 00:35 11-7-2005, you wrote:
> > Hi,
> > > Is the 'call control unit' -- the electronics chassis on the right hand
> > > side -- the same?
> > On *my* 390 there is a slightly different "call control unit". But I
> > have several 33s and nearly each has a different ccu. Normally you don't
>There is one Teletype call control unit that was used in the version that
>had a built-in 20mA loop interface and no modem. This is the version
>that was supposed to be directly connected to the computer's interface,
>and it's the version most commonly found.
> > have to worry about that if you have a current loop device in working
> > condition. There are also a lot of different wiring options for the
>No, but it certainly matters if you have to repair it...
> > machine.....
> > > where the mechaical bits are normal Teletype ones, but the
> > > call control unit is very different. It's built on a couple of PCBs (!)
> > > and can handle both RS232 and current loop interfaces.
> > Hey, that's cool. PCBs are normal in all CCUs.
>The Teletype one I menitoned has one little PCB in the selector magnet
>driver (the reader PSU, also on a PCB, is not strictly part of the CCU,
>even). There's a lot of hard-wiring too.
>The Data Dynamics one, IIRC, has 3 PCBs in it. One carries all the Molex
>connectors at the back, which the mechanical parts plug into. The others
>contain the reader PSU, singalling PSU, selector magnet driver, etc.
>Almost no components no on the PSU.
> > It will be hard to find schmematics for that.
>Yes, but probably not too hard to trace out by hand if need be.
> > > Believe it or not, the Teletype manuals for the Model 33 do
> have cleaning
> > > and lubrication charts for the cover...
> > :-)
> > ... but there's no information about glueing together broken pieces of
> > grey plastic.... :-)
>The best way to do this IMHO is to put the bits together and run a brush
>dipped in dichloromethane along the cracks. This will disolve the plastic
>and weld the parts together. Now take some cotton fabric, put it over the
>repair on the inside of the case, and brush it over with the
>dichloromethane. When the plastic has softened, force the fabric into it.
>The result is a fairly strong repair...
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