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</style><article id="node-1374086" class="node node-logentry contextual-links-region article ia-n clearfix" role="article"><header class="node-header"><h1 class="node-title">
<a href="https://logbooks.jlab.org/entry/4301038" rel="bookmark">SBS HV Power Supply Issues</a>
</h1>
</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/4301038/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/4301038/delete?destination=email/send">Delete</a></li></ul></div>
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<p class="author-datetime">
Lognumber <a href="https://logbooks.jlab.org/entry/4301038" class="lognumber" data-lognumber="4301038">4301038</a>. Submitted by <a href="https://logbooks.jlab.org/user/bhasitha">bhasitha</a> on <time datetime="2024-05-10T09:33:42-0400" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1715344422&end_date=1715351622&book=BIGBITE&book=HALOG&book=SUPERBIGBITE">Fri, 05/10/2024 - 09:33</a></time>. </p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/bigbite">BIGBITE</a> <a href="https://logbooks.jlab.org/book/halog">HALOG</a> <a href="https://logbooks.jlab.org/book/superbigbite">SUPERBIGBITE</a></td></tr><tr><th>Entry Makers: </th><td>hszumila, bhasitha</td></tr></table></div>
<div class="logentry node-content">
<p>New power supply put into the SBS stack during the access on 05/09/2024 has stopped responding around 04:30AM (run990). Seems like the communication froze for that particular power supply(Only indication was that the ADC distributions on the replay plots were gone, no alarms has gone off since the HV read backs were flat-lines). And when logged into the crate, non of the HV boards were recognized. This has affected the modules L3M3, L4M1, L5M1. Powercylcing the crate and re-enabling the EPICS has fixed it for now.</p>
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