Re: [Gumstix-users] Summit Board R2563 Version

[Krishna S. <sag...@gm...>]

I have the exact same problem. I posted the question about this
yesterday. Some more digging after that lead me to essentially the
same conclusion as you. And I opened my inbox to send the same out..
but you beat me to it...

Yes, IC2 on my summit board also has "BRR" marking. Even when GPIO168
is high, VBUS does not go above 0.5v - 0.6v  and so no USB devices are
detected. My summit board is also R2563.

How do we request RMA on these thing? I couldn't find any info on the website.

Thanks,
--Krishna/.

On Sun, Apr 11, 2010 at 12:50 PM, Gene Tacy <ge...@tr...> wrote:
>
> I have 3 Summits marked R2563 and notice that the layout and schematic
> are different than the R2185 that has schematics available. There was a
> new directory added to /boards/SUMMIT for the R2563 schematic and layout
> on March 29th but no files and I am in need of the files if anyone can
> provide them.
>
> I have been unable to get the host port on any of these boards to
> recognize attached USB devices. After examining the schematics for the
> R2185 version of the board I have concerns over the VBUS boost converter
> circuit that is intended to supply 5V. The part that is installed on the
> board is marked with a BRR marking making it an adjustable output
> version of the TPS6120x series and as such should not have the FB pin
> tied directly to the VOUT  pin as indicated in the schematic. In this
> configuration I am seeing the VBUS voltage oscillating between .5 and .6V.
>
> I am guessing that this part "IC2" should be a TPS61202 as indicated in
> the schematic? Anyone else have a summit who can verify the marking on
> the part?
>
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