[GreenKeys] Model 33 Progress

[drlegendre .]

Brad,

If the machine operates in local mode, then it most definitely will
"communicate". It's doing exactly that already, albeit in a local loop. The
KB is sending data and the TU is receiving and printing it.

Getting it to talk to another machine is as easy as making the correct
connections.

As far as the thermal fault, I'd suspect an issue with the power supply or
other control electronics. I don't have a 33 ASR schematic at hand, but if
there's a regulator in there, I'd head in that direction. That assumes all
the new (are they new?) caps are good, etc.

On Fri, Dec 2, 2016 at 5:54 PM, Brad via GreenKeys <
greenkeys at mailman.qth.net> wrote:

> So I think we are about 95% of the way there with the printing unit on
> this 33, many thanks again to Wayne.  I have two characters that are
> persistent issues – L almost always comes out as H unless you hold the
> repeat key.  O very often comes out as a / right at the left most side then
> gets normal.  M sometimes is an I.  I think that’s just sticky codebars.
>
>
>
> I’m working on changing the wiring to 20ma current loop so I can interface
> this thing and see how it actually communicates, if at all.
>
>
>
> The only weird thing is if I run the 33 for longer than, say, 30 min,
> suddenly all the characters I type become random.  If I unplug and let the
> 33 sit for 20 min, then power up again, it’s back to normal.  I would be
> tempted to think caps but I have ‘new’ tested caps from Wayne.
>
>
>
> Another thing – the tractor doesn’t pull paper.  Linefeed works, but
> typically it’ll only advance the paper a half line and then not at all.
> It’s like it has no grip.
>
>
>
> Other than that, she’s looking great. J  Thanks to everyone for their
> help and suggestions.
>
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