
如果個鍵不會回彈, 很大完因是鍵的木質和毛布發賬. 用鬆鍵鉗做小手術就可以.
If the key is sticky, can be cured simply with a key easing pliers.
假如個鍵回彈, 但在擊鍵沒有反應. 可能是Jack的中軸問題. 要更換中軸和擴大軸孔. 圖中可以見到撀弦機拆除中軸後的部件.
If the key rebound, but can’t fire, it obviously the centre pin of the jack in trouble. Replace the pin and easing the pin hole. The picture is a dissembled action parts without centre pin.