I ended up on your site, looking for a fix for my korg X3. I would really appreciate any insight on this matter any suggestion or comments if you have ever came across something similar. I opted to write to you hoping this issue might be something other Korg fans have experienced and have shared their experience with you! The Korg just simply turned off with no signs of any wrong doing or mishandling. We did an odor smell checking for burning smell but nothing foul was detected. We tried a different outlet and power strip and even a different power cord but the Korg just simply did not power on at all. (While the „On“ button was on „On“ position) 15 Min later I came back to start the event and the Motif was on but the Korg had turned OFF. We powered both keys a Motif XS6 and the Korg 01/W Pro both keyboards working in perfectly conditions and coming from the same electrical strip. (This was an outside event, no rain in the forecast and under a tent) However, two weeks ago while setting up for a church event we were installing and setting things up. The keyboard looks brand new even the finish looks intact! I bought it not too long ago 2 months to be exact! I bought it used from someone that had this amazing keyboard stored for years until he decided to part from it. I my self am going through some technical difficulties that have burden me with concern over my Korg 01/W Pro. Thank you for sharing all of your tips with the whole world. Of course, it is not state of the art to replace an SOT89 SMD component with a TO92 through-hole component, but firstly it would have taken some amount of effort to get the SOT89 variant and secondly it is yet a robust and well-functioning replacement in this case (fitting pinout and leads, no thermal or mechanical aspects to be considered). As you can see on the photos I also replaced IC53, which stabilised at 4.5 volts and not 5.0 volts. So I replaced C100 and patched the broken trace by scraping off a bit of solder resist and bridging it with solder. Then I noticed that one of the C100 capacitor’s leads had been „eaten“ by the acid and - more important - the +12 volt trace below the lead had also been etched away. While measuring I found that the negative leg around the IC52 (79L05) was operational but IC53 (78L05) floated around at 0 volts on it’s output and input. I replaced the two evil caps, connected the mainboard and powered up the 01/W, but there was no sound. What has been left over from the „acid attack“ on my 01/W did not look dramatic at first. And the cleaning should be repeated a few times with fresh swabs. There’s no need to spare with the isopropanol, it does not do any harm to electronic components and evaporates without residue. To clean this type of mess I prefer cotton swabs heavily soaked with isopropanol (isopropyl alcohol).
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