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RE: Burned Connectors in PCs
Some
measurements of the various contact points might be useful.
The
chain is
-
crimp joints (wire to contact)
-
connector (contact to contact)
-
the PCB (say connector to the CPU regulator)
In
each case, the drop should be a few mV, and not change with
time.
It would be usefull to repeat these on the
same machine over a period of a few weeks or
months.
**
Temperature is another avenue of attack. For a $100 or
so, a gun can be purchased that provides instant, hi resolution (0.1c or better)
temperature measurement.
These
are great tools for investigating the thermal side of packaging a
product.
These
things come with various beam angles; in this case probably narrower is
better.
Good
luck
Jon
Keeble
We have a rackmount PC with a 400 Watt
power supply. The power consumption of all our cards is quite high,
about 284 Watts, still less then 75% of the rating though. The power
supply is rated for
30-50A for the +5V
20-11A for the
+12V
Shared
between the 2
We are drawing 36A of +5 and 8A on the +12
The
problem is that, after time (6 months - 1 year), the units will fail and we
noticed that the connectors which mate with the backplane are actually
fused(melted) to the backplane. In line with the +5 V wires (red
wires), the connector is actually black and in many cases the connector is
arc welded to the backplane.
Ideas.
... Pierre