Sequential Circuits Pro One J-wire Keyboard Assembly
For sale is a replacement SCI Pro One J-wire keyboard. This is super rare and incredibly hard to find. Especially useful if you have a Pro One with serial number past 8500 with a failing membrane keyboard. The membrane keyboards are essentially impossible to repair but the J-wire ones are always good to use and easily fixed if a key stops working. This keyboard was tested in a Pro One we previously has and we found it to be fully functional (although some J-wires may need adjustment after shipment which is common). The only issue was the bottom left key has a broken hinge, but replacement keys are easy enough to find online or from part stores.
Fairly simple to swap the entire keyboard in your Pro One under 30 minutes, no soldering or technical skills required, just taking out a few screws, opening up the unit and disconnecting a couple cables, and installing new keyboard.