On Wed, Jun 23, 1999 at 11:22:23PM +0100, Tony Duell wrote:
> In my experince (at last count I have 5 of the little machines...),
> most HX20 problems are due to bad connections. Have you reseated the
> tapewire connectors between the keyboard and the CPU board and
> between the display and the keyboard?
I'll have to bring the whole unit into the lab tommorow and try it
all.
> _NICE_ toys :-)...
And I didn't even mention the brand new Tektronix colour LCD
oscilloscope, or the Ritek computer-controlled ultrasonic pulser
(which I'll be programming this summer). :)
My personal equipment (an HP 184A, broken, and a Radio Shack
multimeter) pale in comparison. Of course, mabye I would have more if
I actually knew how to use them...
[more tips which I'll be investigating tmw snipped]
> I have the hardware manual for the HX20 - it's really a service
> manual and includes schematics, etc. Let me know if you want me to
> look things up. From what I remmber, the PSU is quite simple, and it
> depends on the NiCd pack to set the voltage on the (nominal) 5V
> line. There is no 5V regulator in the machine.
Oro? That seems a bit funny -- the components must be really good at
handling over- and under-voltage, then. From what I remember, the
voltage of NiCds drops really fast when the battery is low.
--
Brad Ackerman N1MNB "...faced with the men and women who bring home
bsa3_at_cornell.edu the pork, voters almost always re-elect them."
http://skaro.pair.com/ -- _The Economist_, 31 Oct 1998
Received on Wed Jun 23 1999 - 19:54:16 BST