A pad structure 100 includes an electrode pad and an insulating film provided over a peripheral region of the electrode pad so as to surround the electrode pad, and the insulating film has a structure including a protective film and a transparent resin film provided on the cover oxide film 106. Each of the virtual access channels provides a set of memory access resources for controlling the main memory. Audible signals are custom mapped to individual imaging machine anomaly or exception conditions by a user. In various embodiments, the forming, coupling and converting steps are performed by or through a printing process. For instance, the opening is an annular opening, and the louver is formed in inclination along the annular opening at an outer edge of the annular opening. Because the test signals have distinguishable signal patterns, the analysis of the signal indicators is simplified and, in certain circumstances, made possible.