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Send it to Intellijel - they fixed mine for free.
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Peter Knoot
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<img id="0c59380e-9352-427b-935a-79433cbf1ec2" class="aspect-ratio" style="width: 74px; height: 59px; max-width: 100%;" src="cid:0c59380e-9352-427b-935a-79433cbf1ec2" alt="" width="74" height="59">
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14197 N Hidden Arroyo Pass
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Marana, AZ 85658-4995
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USA
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650-759-2101
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<a href="http://www.synquanon.com">www.synquanon.com</a>
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This communication (including attachments) is covered by the Electronic Communications Privacy Act, 18 U.S.C. 2510-2521. This communication is confidential and may be legally privileged. If you are not the intended recipient, you are hereby notified that any retention, dissemination, distribution or copying of this information is prohibited. If you have received this communication in error, please notify me by telephone immediately and destroy the information. Thank you.
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On 02/15/2023 4:58 PM MST Shawn Rakestraw via Synth-diy <synth-diy@synth-diy.org> wrote:
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Someone gave me an Intellijel TSP80W power supply that is not working correctly. It is for eurorack of course. The +12V and +5V look good, but there is nothing on the -12V.
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I sent Intellijel a message and asked for any help they might offer, but I thought I would ask here also while I wait for their response.
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A few things to note is that there is an LTC3853 Triple Output Step Down Converter. I don't know anything about this chip, so I don't know if that is creating / controlling all 3 voltage rails or not. Near the end of the circuit just before the -12V LED, there is a series of IRF5305 Mosfet, then a STPS745G rectifier, and I believe an inductor marked 150 1752.
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I found a ceramic capacitor between the mosfet and rectifier that seems shorted, but I don't know if there is another part of the circuit causing that or not. And I haven't tried removing the cap yet to test it off the board.
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If anyone thinks it is worth seeing pictures or anything, I can try to attach.
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Thanks for any help.
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Shawn
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