| 摘要 |
PROBLEM TO BE SOLVED: To prevent the malfunctioning of a control means by the removal of an error signal based on a potential difference, temporarily generated between the control means and the ground or other operations. SOLUTION: In regard to a game machine 1 such as a Pachinko machine or an arrange ball machine, there are arranged a first ground Ga, a second ground Gb, a signal working means 6 which is electrically connected to the second ground Gb to work a first signal Sa inputted through a signal line 5, a control means 3 which is electrically connected to the second ground Gb to perform a control based on a second signal Sb worked by the signal working means 6 and a filter means 7 which is electrically connected to the second ground Gb while being interposed between the signal working means 6 and the control means 3 and transmits the second signal Sb only when the second signal Sb meets specified conditions. The filter means 7 transmits the second signal Sb to the control means 3 under the conditions that the second signal Sb fails to be an error signal (when the specified conditions are met) thereby preventing the malfunctioning of the control means 3.
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