IBM ps/2 P70 Plasma screen voltages

From: Tony Duell <ard_at_p850ug1.demon.co.uk>
Date: Fri Apr 30 17:46:48 2004

> Yes, that certainly makes sense. I didn't mean that PC type plasma
> panels would use the inherent memory feature. But it still wouldn't
> surprise me to see the complicated high voltage AC main power supply
> just as on the original design.

It wouldn't suprise me either...

Alas I know little about the display panel in the Integral. The rest of
the machine was mostly stnadard chips (68000, TTL, DRAMs, ROM, etc) and
HP parts that I had data on (1LB3 HPIL chip, Thinkjet printer chipset,
etc). The only thing I had to puzzle out was the display controller, and
that didn't take too long

However, the display seems to be all custom chips on the back (well,
there were a couple I could identify, and many more I couldn't). And
because of the high voltages, I didn't want to probe around too much with
the LogicDart (which has a maximum input voltage of 40V -- it's fine for
a board of logic, even if there are RS232 drivers on it, but not on a
plasma panel). So I indentifed the signals on the input connector and
left it at that.

-tony
Received on Fri Apr 30 2004 - 17:46:48 BST