| 摘要 |
PROBLEM TO BE SOLVED: To prevent failure of an amplifier regardless of a specification of a control board for controlling a speaker even when a wire is disconnected between the amplifier and the speaker.SOLUTION: A game machine comprises a second terminal group including a plurality of connection terminals which are connected to sound amplification means and can be electrically connected to a first terminal group through signal wiring means. The second terminal group comprises: a first connection terminal used when a sound signal is output to sound generation means; and a second connection terminal in which an amplitude value of the input signal changes according to the presence or absence of the electrical connection between the sound amplification means and the sound generation means. The sound amplification means has a sound output control terminal that is electrically connected to the second connection terminal. If the amplitude value of the signal input to the sound output control terminal is an amplitude value when there is no electrical connection between the sound amplification means and the sound generation means, the sound amplification means stops the output of the sound signal to the first connection terminal.SELECTED DRAWING: Figure 8 |
