I have an Sk1 that has gotten a lot of use this past year. Had to open it numerous times to adjust key pads, tighten power jack, and now I have an issue where every 8th key is out. It seems like a circuit board issue. Has anyone encountered a circuit issue that impacts every 8th note? Getting the schematic has been brutal. Does anyone have the schematic?
its a dirty or corroded contact somewhere in the keyboard matrix. You will have to go through all the dead keys to find the problem. But if there’s one issue with the keyboard you might as well strip the rest ass they too will be getting issues. dirty contacts are a common issue.
You can download Service Manual here.