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<div class="moz-cite-prefix">Regarding soldering, I've faced that
problem in the past. I've had good luck with preparing a battery
by soldering red/black pigtails to the battery, wrapping it in
heat shrink tubing, then soldering the pigtails to the board after
snipping (no heat) the old battery out. Then figure out some way
to anchor the battery (tie-wraps, etc) if necessary. It also makes
it easier to replace the battery again 30 years later :)<br>
</div>
<div class="moz-cite-prefix"><br>
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<div class="moz-cite-prefix">I think the key when working on old
fragile boards is to take every precaution to avoid heating the
board due to soldering. The pigtails provide a measure of
soldering heat isolation. Soldering the wires to the battery
requires a hot iron and flux.</div>
<div class="moz-cite-prefix"><br>
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<div class="moz-cite-prefix">JJS<br>
</div>
<div class="moz-cite-prefix"><br>
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<div class="moz-cite-prefix">On 8/7/2022 7:33 AM, Jean-Pierre
Desrochers wrote:<br>
</div>
<blockquote type="cite"
cite="mid:000201d8aa6a$a40dc210$ec294630$@oricom.ca">
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<p class="MsoPlainText"><span
style="color:black;mso-fareast-language:FR-CA">Hi all,<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-CA">A friend of mine
brought me a working Oberheim Matrix 6 keyboard<br>
that he was worried about the inner memory lithium battery
(BR2032)<br>
being about to die.. and to replace it.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-CA">Well after a quick
check the battery was still in pretty good physical
condition (no leakage)<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-CA"><img
style="width:2.0833in;height:1.9166in" id="Image_x0020_5"
src="cid:part1.xkPGeyq0.CRR0pyxt@yahoo.com" class=""
width="200" height="184"></span><span lang="EN-CA"><o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-CA"><br>
and was showing a strong 3.23v on its terminal (AC
unconnected)<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-CA">So.. In this
situation I’m wondering if this lithium cell should be
replaced or not.<br>
I know this keyboard is at least 30-40 years old and many of
the coin<br>
batteries of these vintage keyboards need to be replaced,
but..<br>
And on replacement I thought about soldering a coin battery
socket<br>
on the PCB pads BUT the battery placement on the PCB<br>
is very close to some IC’s as shown on the picture and<br>
would need the socket to be raised a little to avoid these
IC’s.. I don’t like that.<br>
I could also buy a coin battery with PCB legs too like this
one<br>
but again, replacement or not ?<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-CA"><img
style="width:2.2812in;height:1.9062in" id="Image_x0020_6"
src="cid:part2.rktZbx4m.aqnOikwn@yahoo.com" class=""
width="219" height="183"></span><span lang="EN-CA"><o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-CA">I don’t know the year
of manufacture of this Matrix but here are<br>
the serial number and BIOS number.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-CA">SN: 7622661<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-CA">BIOS: M6R 2.13<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-CA">Your opinions are
very welcomed.<br>
Cheers !<br>
Jean-Pierre <o:p></o:p></span></p>
</div>
<br>
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