<div dir="ltr">I got it working. For anyone who needs the pinout, this is correct:<br><br> 6 7<br> 1 8 3<br> 4 5<br> 2<br><br>correct pinout:<br>1 +5vdc<br>2 “<br>3 “<br>4 gnd<br>5 gnd<br>6 gnd<br>7 12vdc<br>8 -12vdc<br><div>shield gnd</div><div><br></div><div>That is the pinout on the male connector side (power brick cable). From the female/Qube side, the pinout has 6 and 7 reversed.</div><div><br></div><div>- Alex<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, May 3, 2024 at 3:42 AM Plamen Mihaylov via rescue <<a href="mailto:rescue@sunhelp.org">rescue@sunhelp.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi,<div><br></div><div>Let me check as I made few PSUs for cube3<br><br>On Friday, May 3, 2024, Alexander Jacocks via rescue <<a href="mailto:rescue@sunhelp.org" target="_blank">rescue@sunhelp.org</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>All,</div><div><br></div><div>I just picked up a fairly nice Cobalt Qube 3, but it did not come with a power supply. I beeped out the power connector (DIN-8) on the back of the chassis, knowing that it needs +12, +5, and -12 vdc, from the labeling on the chassis.</div><div><br></div><div>Checking the continuity with the mosfets on the other side of the power connector, on the backplane, I found the following:</div><div><br></div><div>Facing back of chassis</div><div>power input connector (DIN8 female)</div><div><br></div><div> 6 7<br> 1 8 3<br> 4 5<br> 2<br><br>1 probably +5vdc 4430 mosfet (middle) pins 5-8 (drain)<br>2 “<br>3 “<br>4 gnd<br>5 gnd<br>6 -12vdc 4435 mosfet (right) pins1-3 (source)<br>7 gnd<br>8 probably +12vdc 6690 mosfet (left) pins1-3 (source)<br>shield gnd</div><div><br></div><div>I looked up those parts, and the 4435 mosfet specifies negative voltage, so I assumed that would be -12vdc. The 3 wires is clearly +5vdc, since the machine says that it needs +5@8a. -12@0.5a and +12@1.5a are the other voltages, I believe.</div><div><br></div><div>Does anyone have a working PSU that they can verify this with?</div><div><br></div><div>I made up a power supply and cable using a Mean Well RT85B supply and some good quality silicone jacketed wire. I verified that nothing unexpected is shorted. The PSU powers up fine, without the machine attached, and all the voltages are correct. However, if I plug in the DIN8 cable, the PSU shuts down, clearly shorted.</div><div><br></div><div>Any help would be appreciated.</div><div><br></div><div>- Alex<br></div></div>
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