What is actually warming up in vintage synths?

[SynthWizard]

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What is actually warming up in vintage synths?

<!-- SC_OFF --><div class="md"><p>At the moment I’m fixing a Korg polysix (VCO) and a Roland JX-3p (DCO). Both seem to need time to warm up but for different reasons. The polysix improves its tuning over a few minutes, and the 3p starts in tune but with some dirty voices and then becomes normal over ~10 minutes. I’m no electronics expert so I’d be interested in knowing the basics of warming up a synth. Is it the voice chips that are literally warming up?</p> </div><!-- SC_ON --> submitted by <a href="https://www.reddit.com/user/mondayroast"> /u/mondayroast </a> <br/> <span><a href="https://www.reddit.com/r/synthesizers/comments/vdaeu5/what_is_actually_warming_up_in_vintage_synths/">[link]</a></span> <span><a href="https://www.reddit.com/r/synthesizers/comments/vdaeu5/what_is_actually_warming_up_in_vintage_synths/">[comments]</a></span>