Repair Kawai R-100 Vintage Digital Drum Machine Reparatur Service

Kawai R-100 vintage digital drummachine with dirty buttons. Since I have a bunch of tactiles laying around which I usually order from good electronic stores such as mouser, digikey, farnell, reichelt or conrad (eBay, if no other chance), I could replace them quickly. I noticed some UV discoloration, but since you cannot see a change I din't use retrobrite here. I cleaned the potentiometer in my usual way and ordered some dust cover replacements from a college. Modification was already in here. You can plug in different chips for different sounds. Everthing tested ok. I liked the result. Like always I share my knowledge and pictures with you.