On 6/27/2011 9:18 AM, der Mouse wrote: >>> [...4501...serial port doesn't drive any pins...] >> swapping power supplies is a worthwhile test but since you have a >> multimelter you've probably tested the ps already. > Not with the meter, for two reasons: (1) I can't easily put the meter > on it except under no load, which isn't a very useful test, and (2) I > figured if it worked enough to get link on the Ethernets and get the > behaviour I described out of the front-panel lights, it should at least > drive voltage on the transmit pin of the serial port. > > Of course, I don't know the circuitry backing the serial port. But > most serial ports in my (admittedly limited) experience always drive > voltages on their transmit lines whenever they're powered up. > > I'll see how much work it would be to get to the points on/near the > power connector that will let me measure the voltage under load. > > /~\ The ASCII Mouse > \ / Ribbon Campaign > X Against HTML [email protected] > / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B > _______________________________________________ > Soekris-tech mailing list > [email protected] > http://lists.soekris.com/mailman/listinfo/soekris-tech Maybe someone on the list with a multimeter could measure their voltages and see how much different they are from your voltages. I would do it, but I am 4400 miles from my Soekris (5501) board..
Bob G _______________________________________________ Soekris-tech mailing list [email protected] http://lists.soekris.com/mailman/listinfo/soekris-tech
