A while back several list members helped me identify a component that was damaged on a Net4801 here so I thought I would update you on the end result. I never did manage to replace that part, and indeed after removing the dead component it looks like one of the solder pads is damaged enough I likely will not be able to.... However, on a whim I tried using the 5volt input pins on the board, and it works!
So despite the definite damage to the power path from the external barrel connector the rest of the system is still working properly I am glad to say. An interesting quirk is that on the first boot the CPU was identified as 185Mhz rather then 266, but that went away after reboot. Sean Murphy [EMAIL PROTECTED] On 28-Nov-07, at 12:51 PM, Sean Murphy wrote: > On 28-Nov-07, at 1:02 AM, Soren Kristensen wrote: > >> 1206 ferrite bead 300R 2.5A, t.ex. MI1206M301R available from >> Digikey. > > Thanks Soren - it may be a while before I have access to the necessary > tools, but once I do I will give that a try. > >> But please note that multiple parts in the power supply circuit >> often dies when something like that happens.... > > and yes, as was stated by a few others that may indeed be the case > here, but for the cost of the part and a few minutes time I may as > well try! > > On 28-Nov-07, at 8:54 AM, Poul-Henning Kamp wrote: > >> Actually, it might be the flank that killed the ferrite, not the >> raw current. > > This makes sense here I think. > > For a bit of background, the net4801 was acting as a routing computer > for a remote wireless network repeater station up on top of a ridge on > an island. Due to the remote location the system is powered by solar > and wind with a large battery bank. The short occurred not on the > soekris or on the lines between it and the battery, but in a line that > heads up to the wind generator. The short was a result of storm > damage and was not a dead short but an intermittent arcing to ground > (via the tower) and never pulled high current long enough to trip the > fuse that is in place between the batteries and the equipment. > > On 28-Nov-07, at 12:39 AM, Stanislav Meduna wrote: > >> However, this looks more like damage to the board than >> to a component, I'd guess a thin trace got overloaded >> and overheated. > > Actually things look ok in that respect, I took that picture before > touching things and after wiping the residue off the board looks ok, > while the part seems to have opened up and spewed the nice fan you see > there. > > Thanks for all your responses! > > Sean Murphy > [EMAIL PROTECTED] > > _______________________________________________ > Soekris-tech mailing list > [email protected] > http://lists.soekris.com/mailman/listinfo/soekris-tech _______________________________________________ Soekris-tech mailing list [email protected] http://lists.soekris.com/mailman/listinfo/soekris-tech
