Osborne OCC1 problem
Roy J. Tellason
rtellason at verizon.net
Fri May 16 19:56:59 CDT 2008
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.
That's *definitely* too low, if it's supposed to be +5V. Enough to cause the
logic to act quite strangely...
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