| 摘要 |
PROBLEM TO BE SOLVED: To provide a conversion module with a structure suitable for switching connection of signal line, and simple in structure with less number of part items. SOLUTION: On the upper-surface side of a wiring board 3, various electronic components 11 such as an element 9 for signal conversion are mounted. A plurality of socket pin-holding holes 5 are formed corresponding to a terminal 6 of a grid array 2 on the conversion board 3. For socket pins 24 and 24A, a part of them protrudes from a lower-surface side of the wiring board 3, while being held in the socket pin holding hole 5. On the upper-end side of the socket pins 24 and 24A, a structure for attaching/detaching the terminal 6 is provided. For a specific socket pin 24A, switching connection of signal line is performed. The ring board 3 comprises a holding hole formation part H1, where the socket pin holding holes 5 are densely formed and a holding hole non-formation part H2 where no socket pin holding hole 5 is formed.
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