| 摘要 |
PROBLEM TO BE SOLVED: To provide a circuit board for game machines capable of preventing a fraud by Nikoichi (producing a unit by combining components of a plurality of defective units) and consequently further improving fraud prevention properties.SOLUTION: An auxiliary board 50 including an auxiliary conductive portion 51 to be served as a part of an electronic circuit in the side of a main control board 30, and an easy rupture portion 52 liable to be ruptured compared with other portions is connected to a main control board 30. The easy rupture portion 52 is configured to be ruptured when external force is applied to the auxiliary board 50, such that the auxiliary conductive portion 51 is cut off. Further, a connection 53 of the auxiliary board 50 is configured to peel a part of a conductive pattern 34 of the main control board 30, when the auxiliary board 50 is peeled from the main control board 30. Thereby, when a person applies large force to the auxiliary board 50 or tries to peel the auxiliary board 50, the electronic circuit in the side of the main control board 30 is broken and it becomes impossible to secure the main control board 30 with no damage, thus making it impossible to do Nikoichi. |
