<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">In this batch we tried to address the reported / experienced problems:<div class=""><br class=""></div><div class=""><ol class="MailOutline"><li class="">USB port dislodged with rough handling - change was to increase solder pad area and adjust thermal profile when soldering</li><li class="">Large capacitors dislodged during shipment - change was to increase <span style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class="">solder pad area and adjust thermal profile when soldering</span></li><li class=""><font color="#000000" class=""><span style="caret-color: rgb(0, 0, 0);" class="">Reports of GPS Antenna non functional (no continuity) - change to new (more robust) internal antenna cable</span></font></li></ol></div><div class=""><br class=""></div><div class="">We have also seen #3 seen internally, during random QC checks, with the GSM Antenna (although no reports from users).</div><div class=""><br class=""></div><div class="">If you remember, back when v3.2 was released we had to change that internal antenna cable (due to ROHS issues with the type of plastic used). Since then we have had a number of reported issues with GPS reception that were traced back to poor contacts or no continuity with these internal antennas (particularly the batch late last year). So, we (a) add a QC step to check continuity and ‘wiggle’ the antennas to ensure they are stable, and (b) change the component to a ROHS compatible antenna similar to the previous one we used. The new component feels much more solid (particularly when connecting to the modem PCB) and so far tests 100% with no QC failures.</div><div class=""><br class=""></div><div class="">Regards, Mark.<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 4 Aug 2020, at 2:39 PM, Michael Balzer <<a href="mailto:dexter@expeedo.de" class="">dexter@expeedo.de</a>> wrote:</div><br class="Apple-interchange-newline"><div class="">
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Great, that looks much more rigid and should solve the issue.<br class="">
<br class="">
What's the reason for / benefit of the thicker antenna cables? Also
just rigidity, or do they have an effect on signal strength?<br class="">
<br class="">
Regards,<br class="">
Michael<br class="">
<br class="">
<br class="">
<div class="moz-cite-prefix">Am 04.08.20 um 03:24 schrieb Mark
Webb-Johnson:<br class="">
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<blockquote type="cite" cite="mid:3B242133-1EC0-4FF2-B6F1-424340FF838D@webb-johnson.net" class="">
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<div class="">The small solder area is my suspicion too, and a
relatively easy fix. Through hole would be better but would
require a new component and circuit redesign (with associated
complexity and re-certification issues). Here are some pictures
of the 2020-06-15 batch with the changes. But it will be some
time before distribution stock is cleared out and those start to
be shipped. Note also that 2020-06-15 also includes a change to
new thicker antenna cables for both GPS and GSM.</div>
<div class=""><br class="">
</div>
<div class="">Regards, Mark.</div>
<div class=""><br class="">
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<img apple-inline="yes" id="A3A46CC6-64E0-4DEE-AFB1-1900850BEE97" src="cid:56203B16-6163-4416-BA2E-D9661951968D" class="" moz-do-not-send="true"> <img apple-inline="yes" id="4BD348E7-D908-4538-899E-45AD1DB70DB1" src="cid:B1830355-06AB-4828-94E0-AE3081603414" class="" moz-do-not-send="true">
<div class=""><br class="">
<div class=""><br class="">
<blockquote type="cite" class="">
<div class="">On 4 Aug 2020, at 9:11 AM, Craig Leres <<a href="mailto:leres@xse.com" class="" moz-do-not-send="true">leres@xse.com</a>> wrote:</div>
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<div class="">On 2020-08-03 01:26, Michael Balzer wrote:<br class="">
<blockquote type="cite" class="">I've had multiple cases
now of damaged and broken off USB ports.<br class="">
</blockquote>
<br class="">
I managed a mechanical "no heat" desolder of the usb
port on one of my modules last year (I wasn't careful
when sliding the seat back with a cable plugged in).
When I took it apart I could see that there was not very
much solder in the four holes that secure the usb shell
to the board. At the time my suspicion was that the
small amount of solder from the factory wave solder made
for a weak bond. I was lucky that I didn't lift any pads
and was able to resolder it.<br class="">
<br class="">
<span class="Apple-tab-span" style="white-space:pre"> </span><span class="Apple-tab-span" style="white-space:pre"> </span>Craig<br class="">
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</div>
</blockquote>
</div>
<br class="">
</div>
</blockquote>
<br class="">
<pre class="moz-signature" cols="72">--
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
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