Osborne OCC1 problem

[Roy J. Tellason]

On Friday 16 May 2008 12:22, Ade Vickers wrote:
> Right, I've now multimetered the voltages, and:
>
> The 12v line is running at 12.74v
> The 5v line is running at 5.40v

A little high in both cases.

> I didn't check the -13v line
>
> I took readings from a couple places: Straight off the PSU plug, and in the
> case of the 12v, at the monitor plug.
>
> I wasn't sure about the 5v; I took a reading across each of the 8132 chips,
> getting 4.14v and 4.16v; but I guess those may not be meaningful as the
> chip itself will be taking some of that power.

8132 chips?

That's *definitely* too low,  if it's supposed to be +5V.  Enough to cause the 
logic to act quite strangely...

-- 
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space,  a critter that can
be killed but can't be tamed.  --Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James 
M Dakin