7 Dec
2004
7 Dec
'04
4:13 p.m.
On Wed, 8 Dec 2004, Tony Duell wrote:
That's what I'm saying!
I've got
one of them TI Silent 700 Model 703 portable data terminals. The
external power supply that comes with it is 20VAC. It's got three
conductors on the connector. I can't get any voltage out of it. Is it
dead?
Or is it that it needs to sense a loop or something across all pins before
it starts emitting juice? Not likely, I'm sure, but I thought I'd ask
I would eb very suprised.... An AC-output PSU is most likely just a
transformer. At the risk of 'teaching grandma to suck
eggs', cna I just check that
you're using the AC range on your multimeter (VOM, whatever you call it)?
If you're using a DC range, it will most likely read zero.
I'm pretty sure I remembered to put it on AC since I'm thinking back to
when I tested it and I can see an image of only two options, 20 and 200,
and that particular VOM only has two option ranges for AC, so I must have
had it set right. But just to be sure, I'll check again.
Also, with the unit unplugged from the mains, can you
measure the
resistance betweenn the pins on the output plug (I would expect at least
2 of these to show a low resistance between them [1]) and between the
live and neutral pins of the mains plug (again, a finite resistance due
to the transformer primary winding).
I'll do that.
--
Sellam Ismail Vintage Computer Festival
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