After mounting the piezoelectric sounder on the printed circuit board or the set, if
you apply a large force exceeding the fitting force or the adhesive force to the side of the product,
the casing or the vibration plate will separate from the rear cover. If you re-assembled the casing and
the piezoelectric diaphragms, the exterior may in some cases appear to have returned to the condition
prior to the separation of these parts.
However, it is likely that the electrical characteristics may fail to have been
restored on account of deformation, mis-positioning of the pins or mis-positioning of the piezoelectric
diaphragms during re-assembly.