Keys, membranes, displays and encoders: separate wear replacements from electronic identity

Keybeds, membranes, displays, encoders, sliders and buttons are wear-prone parts. Replacement may make the instrument far more usable without necessarily changing its primary sonic identity.

Record which components were replaced, whether replacements are original, compatible or modern, and whether the original parts remain.

Also check key consistency, display readability and control response, because good cosmetics do not guarantee full functionality.

For collectors, documented maintenance and transparency are often more useful than a generic “never opened” claim.