| 摘要 |
PROBLEM TO BE SOLVED: To restrain a processor from malfunctioning by a method wherein a metal case is connected between a solid pattern and the GND wire of a DC power supply such as the GND of the processor. SOLUTION: A solid pattern P3 is buried in a region other than a control panel board controlling signal wire, a DC power supply pattern P1 which drives a processor or the like through intermediary of J1, a DC power GND pattern P2 connected to the processor or the like through the intermediary of J1. A metal case AM1 is connected between the solid pattern P3 and the GND wire of a DC power supply such as the GND of a processor. That is, metal terminals T1 and T2 are connected to the metal case SM1 which holds a control panel board by screwing machine screws. By this setup, a processor can be restrained from malfunctioning.
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