The beautiful wooden keyboard of the Kawai MR25. There’s amazingly little dirt considering this piano was used on stage for decades… One of the five non working keys is fixed (simple adjustment, D#1), the others are next to each other (F1 to G#1) and are scanned using the same output pin of a 74LS138 3-to-8 decoder. So I guess either the output has failed or there’s a bad solder joint or cable. I need to bring a scope from the office tomorrow…
#Kawai #e-piano #electronics #music