[Arm-netbook] rev0 a10 eoma68 board bringup
Dr. David Alan Gilbert
dave at treblig.org
Sun Dec 23 12:48:31 GMT 2012
* luke.leighton (luke.leighton at gmail.com) wrote:
> On Sat, Dec 22, 2012 at 2:06 PM, Henrik Nordström
> <henrik at henriknordstrom.net> wrote:
> > lör 2012-12-22 klockan 10:08 +0000 skrev luke.leighton:
> >
> >> AH HA! 3.3V (off of EXTEN, pin 19 of the AXP209) only comes on for 1
> >> second then drops off.
> >
> > Sounds like overload protection kicks in.
>
> yeah. the software which generated the gerbers had a couple of
> places where diagonal tracks had been overlaid by rectangular pads,
> the software didn't detect that the "clearing" either side of the
> diagonal track obviously needed to cut a corner off the rectangle, so
> it just... joined the two together, yaay! it turned out to be 5V
> joined to GND.
>
> those two faults were found easily enough but this one's a bit more subtle.
Ouch; have you got the gerbers so you can play spot-the-short?
Are these on internal layers or the externals?
Dave
--
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