Buzz fix attempt, tomorrow
dmurrell at waikato.ac.nz
Wed Jan 28 21:10:00 CET 2009
On Tue, 2009-01-27 at 13:04 -0600, Steven ** wrote:
> I too applied the fix. Or, I should say, got a co-worker to apply the
> fix. He worked with surface mount components for a few years and our
> lab has all the necessary equipment to do surface mount soldering. As
> well as a stock room with a fairly large selection of components.
> It took about an hour because the components are so hard to work with.
> I used a tantalum capacitor (as my work's stock room didn't have
> ceramic with the needed specs) which made things rather difficult.
> The capacitor was just small enough to fit inside the case. But it
> could not be positioned as depicted in the white paper. We ended up
> soldering some copper ribbon to the exposed pad to "extend" it to the
> left in order to place the capacitor between the components on the
> right and the screw hole.
> I did not take any pictures (since cameras are forbidden inside my
> place of work).
> I have extra capacitors and resistors I don't need/want. I'm not sure
> if anyone would want them though, since the capacitor was so hard to
> place well.
A thought - as an alternative to using a camera, find a
scanner/photocopier multifunction device gadget thing, and stick the
circuit board on that - it creates much better images. Some of them have
a scan to pdf or tiff, and then fire it to an email address or ftp
server - that's what we've done here.
> On Mon, Jan 26, 2009 at 3:44 AM, kimaidou <kimaidou at gmail.com> wrote:
> > Hi Yoan,
> > I am about to buy the capacitor and resistor and ask a friend to do the buzz
> > fix. Before diving into trouble water, I would really apreciate some
> > feedback on your attemp :
> > * did you succeed ?
> > * is the buzz canceled ?
> > * have you taken photographs on your work ?
> > Thanks in advance
> > Kimaidou
> > 2009/1/6 Yoann ARNAUD <yarnaud at crans.org>
> >> kimaidou a écrit :
> >> >> Tommorow, I (my colleague, actually) will try to fix the buzz of my OM
> >> >> version A5 according to the manual of Joerg.
> >> Since I was asked, here is the documentation I will use :
> >> http://people.openmoko.org/joerg/GSM_EMI_noise/big-C_rework_SOP__DRAFT3__.pdf
> >> --
> >> Yoann ARNAUD
> >> Nantes, France.
> >> _______________________________________________
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