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I remember fixing a Voyager with a faulty cap. This was when they were new at the market.<div>No issues with faulty chips back then.</div><div>I have no schematic so I can’t pinpoint the specific cap otherwise that it was located near one of the transistor arrays.</div><div>I think it was one of the oscillators.<br><br><br><a href="https://overview.mail.yahoo.com/?.src=iOS">Skickat från Yahoo Mail för iPhone</a><br><br><p class="yahoo-quoted-begin" style="font-size: 15px; color: #715FFA; padding-top: 15px; margin-top: 0">Den tisdag, februari 5, 2019, 22:07, skrev Mike Beauchamp <list@mikebeauchamp.com>:</p><blockquote class="iosymail"><div dir="ltr"><br clear="none">> If there's a substantial failure rate beyond expectations these parts<br clear="none">> eventually get shipped back to the manufacturer (called a field analysis<br clear="none">> return or FAR) to figure out why and to make sure it doesn't happen again.<br clear="none">> They'll also do things like recalling any units still in the distribution<br clear="none">> channel and figuring out what should happen to the parts already in customers'<br clear="none">> hands. You really can't guess about the reason, it can literally be<br clear="none">> _anything_ in the thousands of steps in making an IC. It can equally well be<br clear="none">> mishandling of the part during assembly (ESD damage most often being the<br clear="none">> culprit) or something called EOS (electrical overstress) - like using the part<br clear="none">> beyond what it's specified for, but without producing an immediate failure.<br clear="none"><br clear="none">Thanks Achim! I didn't know ESD damage could cause the part to fail <br clear="none">years later. As someone that's DIY'd a lot of synth stuff in the past <br clear="none">without too much thought to ESD, that kind of worries me. I now <br clear="none">currently use a nice ESD mat when working on project, but still don't <br clear="none">use a wrist-strap, etc.<div class="yqt3565209375" id="yqtfd77738"><br clear="none"><br clear="none">Mike<br clear="none">_______________________________________________<br clear="none">Synth-diy mailing list<br clear="none"><a shape="rect" ymailto="mailto:Synth-diy@synth-diy.org" href="mailto:Synth-diy@synth-diy.org">Synth-diy@synth-diy.org</a><br clear="none"><a shape="rect" href="http://synth-diy.org/mailman/listinfo/synth-diy" target="_blank">http://synth-diy.org/mailman/listinfo/synth-diy</a><br clear="none"></div></div><blockquote></blockquote></blockquote></div>
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