<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><br><div><br><blockquote type="cite"><div>On 18 Jun 2023, at 7:40 pm, Florian Anwander <fanwander@mnet-online.de> wrote:</div><br class="Apple-interchange-newline"><div>
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<div class="moz-cite-prefix">PS: there is a picture of the PCB at
<a class="moz-txt-link-freetext" href="https://www.joness.com/gr300/pics/SPV-355/Roland_SPV-355_13.JPG">https://www.joness.com/gr300/pics/SPV-355/Roland_SPV-355_13.JPG</a>
but I could not find them (yet).<br></div></div></div></blockquote><div><br></div><div>Well at least that picture explains what Todd meant when he said "if the LM7915 is unplugged" - looks like the two regulators are on their own plugs, allowing a 'flying' attachment to some big heat sinks.</div><div>Whatever is holding those heat sinks on may have shorted I guess... and they look like they're almost touching</div><div><br></div><div>A</div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><br><blockquote type="cite"><div><div><div class="moz-cite-prefix">
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Am 18.06.23 um 11:38 schrieb Florian Anwander:<br>
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<blockquote type="cite" cite="mid:2d5fe252-467c-7d1b-bbe0-28bd6b769489@mnet-online.de">
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<div class="moz-cite-prefix">Though it is a shot in the mist:<br>
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There are three types of tantalum capactors listed in the
service manual. I bet those are on the supply rails and I bet (a
little bit less) one of them got shorted.<br>
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<span id="cid:part1.EbSffKYh.SfVf8F9m@mnet-online.de"><kiJb1bnXjLNtD1VZ.png></span><br>
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Florian<br>
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Am 16.06.23 um 19:12 schrieb Todd Sines via Synth-diy:<br>
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<span style="caret-color: rgb(0, 0, 0);">I have an SPV-355 that was
behaving adequately fine until recently. Unit will power on,
(and LEDs illuminate correctly) if the -15V LM7915 is
unplugged, when engaged, it shorts and blows both fuses. </span><br style="caret-color: rgb(0, 0, 0);">
<span style="caret-color: rgb(0, 0, 0);"></span><br style="caret-color: rgb(0, 0, 0);">
<span style="caret-color: rgb(0, 0, 0);">Wonder if anyone’s encountered
this and if so, what did you do, or where did you look first?</span><br style="caret-color: rgb(0, 0, 0);">
<span style="caret-color: rgb(0, 0, 0);"></span><br style="caret-color: rgb(0, 0, 0);">
<span style="caret-color: rgb(0, 0, 0);"></span><br style="caret-color: rgb(0, 0, 0);">
<span style="caret-color: rgb(0, 0, 0);">Todd</span> <br>
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