Osborne OCC1 problem
dkelvey at hotmail.com
Fri May 16 21:53:49 CDT 2008
> From: rtellason at verizon.net
> 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?
These are bus buffers. It does sound like there is a bbad ground path.
He should try using a good jumper to cross connect the ground.
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