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<p style="margin-top:0;margin-bottom:0">Hi Xiangdong,</p>
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<p style="margin-top:0;margin-bottom:0">Lets run the card with a separate 24VDC supply and see if that fixes the problems. We will bring the supply over to the lab and hook it up.
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<p style="margin-top:0;margin-bottom:0">Regards,</p>
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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> Xiangdong Wei<br>
<b>Sent:</b> Tuesday, April 16, 2019 9:34 AM<br>
<b>To:</b> Amanda Hoebel; dsg-hdice@jlab.org<br>
<b>Subject:</b> Re: Dilution fridge card</font>
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Hi Amanda,</div>
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So what's the plan for further diagnostics? Should we try to open the power supply if accessible? And/or running the whole system with a separate 24VDC supply powering the 24V board for a extend time to check if it fix all problems or not? </div>
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Thanks,</div>
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Xiangdong</div>
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<div id="x_divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> dsg-hdice <dsg-hdice-bounces@jlab.org> on behalf of Amanda Hoebel <amandah@jlab.org><br>
<b>Sent:</b> Tuesday, April 16, 2019 8:44 AM<br>
<b>To:</b> dsg-hdice@jlab.org<br>
<b>Subject:</b> Re: [dsg-hdice] Dilution fridge card</font>
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<p style="margin-top:0; margin-bottom:0">Hi Xiangdong,</p>
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<p style="margin-top:0; margin-bottom:0">The power supply should be Farnell NP024 10, shown on page A4/CSB2 102 sheet 3 of 5.</p>
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<p style="margin-top:0; margin-bottom:0">Regards,</p>
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<div id="x_x_divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> Xiangdong Wei<br>
<b>Sent:</b> Monday, April 15, 2019 4:41 PM<br>
<b>To:</b> Amanda Hoebel<br>
<b>Subject:</b> Re: Dilution fridge card</font>
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Hi Amanda,</div>
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Do you know which power supply is feeding the PL401 (and the 2 4W-resistors, as shown in the attached circuit diagram, CSB2 102, 4 of 5)? I searched about 14 IGH circuit diagrams but still can not find it.</div>
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Thanks,</div>
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Xiangdong</div>
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<div id="x_x_x_divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> dsg-hdice <dsg-hdice-bounces@jlab.org> on behalf of Amanda Hoebel <amandah@jlab.org><br>
<b>Sent:</b> Monday, April 15, 2019 11:06 AM<br>
<b>To:</b> dsg-hdice@jlab.org<br>
<b>Subject:</b> [dsg-hdice] Dilution fridge card</font>
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<p style="margin-top:0; margin-bottom:0">Hi Xiangdong,</p>
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<p style="margin-top:0; margin-bottom:0">Tyler, Pablo, and I took a look at the dilution fridge card on Friday and we noticed that the card was receiving 30V as opposed to 24V, the correct voltage the card should be receiving. The 30V seems to be coming directly
from the power supply. We cannot access the power supply to take a closer look at it.</p>
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<p style="margin-top:0; margin-bottom:0">We then connected 24V to the card to test how the card behaved. The resistors that were overheating no longer overheated with the 24V supply. <br>
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<p style="margin-top:0; margin-bottom:0">Regards,</p>
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