The bring up continues.
Tony wrote:
At 02:13 AM 6/20/99 +0100, you wrote:
>Are you saying that the lever is released from the electromagnet flap
>when you press a key? I've never seen that happen before. Sounds like the
>trip linkages could be sticking.
Nope. This TTY was recently shipped using the unsafe parcel service* and I
noticed that the linkage was sitting there with nothing "in" it, but it had
a slot like something belonged there. The linkage I'm talking about is
shown in the picture at:
http://www.home.mcmanis.com/asr33/rear.jpg (the
yellow outline was added to emphasize it). I reconnected this linkage,
turned on the system to "local" mode, and voila, it no longer ran forever.
I then tryed typing in local mode.
Problem #2: Typing prints characters, however the print head does not
advance after something has been typed (mechanical pawl somewhere gone
missing no doubt).
Problem #3: Thought I would try reading a paper tape in local mode, put the
tape into the reader and switched to start. Worked great, read the tape but
when the tape was finished the reader didn't stop. When I tried turning off
the reader (lever to "stop" position) the reader didn't stop. Powering down
and then up again got me back to where I needed to be (reader offline)
>OK... It's most likely a mechanical problem, but start by disabling the
>electromagnet (take one of the wires out of the plug housing at the back
>of the call control unit).
Good thing to know.
>Then try to figure out how on earth the magnet is releasing the linkage.
>Fortunately, this is one of the easiest parts of the machine to dismantle
>should you need to do it.
That's nice I hope it doesn't come to that!
--Chuck
* Weird story only a collector would love. So the ASR-33 was well packed by
my standards but apparently it got thwacked hard enough that the plastic
housing that holds the paper tape and covers the punch cracked from top to
bottom. This had the nasty side effect of causing the paper tape to bind on
the sides and thus feed improperly. However, a long time ago, in my
desperation to find a '33 I paid the shipping to a guy who had one in his
garage that had fallen off a shelf and laid on its side. "Probably
repairable, but the plastics are shot to hell." he said. Well I have that
one's keyboard still not quite assembled on my garage workbench. The
plastic was shot to hell but it had fallen on its _right_ side. I went down
and looked and sure enough the punch cover was both removable and
unscratched! Twelve 1/4" nuts later, my "new" 33 had a brand new and
undamaged punch cover for nearly perfect plastics! (the front right screw
hole next to the local/line switch broke, so its hidden behind the metal
plate anyway.) Two, too, to weird!
Received on Sat Jun 19 1999 - 23:20:46 BST
