Thanks Paul. Yes, I know the old Plato plasma display terminals well, having grown up with
my introduction to computers.
The DEC VR01 is a much newer design, though I'm sure it has some similar properties,
high voltage display. Unfortunately, the display itself never lights at this point, just
an LED to
indicate power is on. I suspect the low voltage is at least partially working and the high
other) is detected to be out and so the whole supply shuts down. This is a typical design
Thanks for putting me in touch with your expert.
On 8/13/20 3:38 PM, Paul Koning wrote:
You may want to see if the PLATO terminal
documentation is any help, look on Bitsavers under University of Illinois. Those plasma
display power supplies are hairy devices; the panel is actually a memory device and the
power supply produces a high voltage AC waveform to make that work. Those panels normally
light up around the rim; the fact you see that briefly but not sustained gives some hope
that adjusting may be all that is needed.
That's quite a display; the usual plasma panels were 8 inches square, 512 by 512
pixels. I'm guessing this is a 1k by 1k pixel display, which I have seen once or
twice, at SAI in San Diego in some military displays.
I know a plasma terminal expert; I've forwarded your message to him.
On Aug 13, 2020, at 3:23 PM, Tom Uban via cctalk
<cctalk at classiccmp.org> wrote:
I have a DEC VRE01 terminal that I bought NIB years ago. For those who don't know
about this model,
it has a flat plasma (orange/black) display of about 17". It worked when I bought
it, but now, years
later, I tried powering it up and the light comes on for a moment and goes out. I suspect
supply issue, but bitsavers does not seem to have this one.
Does anyone have schematic (or other) documentation for it?