Hi Sebastien & Uwe, Thanks for your suggestions both.
> As Uwe suggested, this might also be simply a problem with the current limited > supply and the regulators. So here's a simple fix: remove L12 and then inject > directly the 1V2 into the board with your current-limited supply. Tell me if > there is still an over-current condition then - if there is not, do the same > thing with 3V3, then put back all the ferrite beads into place and it should > be safe to power up everything for real :) #1 pcb still have over-current after injeting 1V2 and got 0.12A. While co-worked with Sebastien today, we tried a new #3 pcba to do injet 1V2 at TP4 power only, then still got over-current. So checked a bare new pcb to injet 20V at TP4 only, got no current. So 1V2 loop on pcb is good. Then we were suspicious the quality of coupling capacitors on 1V2 loop. I need to use more precisely current meter to measure which capacitors caused this? 470nF, 4.7uF or 100uF? I'll report this results. Thanks for your exlicit suggestions both. Adam _______________________________________________ http://lists.milkymist.org/listinfo.cgi/devel-milkymist.org IRC: #milkym...@freenode Webchat: www.milkymist.org/irc.html Wiki: www.milkymist.org/wiki
