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Vintage Synth Repair

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Re: [vintagesynthrepair] Re: Simmons SDE

2012-05-07 by Christian Oncken

very strange.. I'm pretty sure the ICs were not insulated from the heat sink when I opened it up. So either they weren't in thermal contact with it with a very small gap, the heat sink compound acted as an insulator, or there were little insulators in there that slipped out when I took it apart.

So I measured the power supply outputs again with the power supply disconnected and found 16v on what I'm pretty sure is supposed to be the 6v output leg of the 7806. I swapped the 7806 out for a new one and the voltages were the same. Any idea what could be causing this?

Thanks
Christian


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