Step Seven: Galaga Start Button Repair
The Galaga Start or Fire buttons are very simple and you can have them fixed in no time. There will either be a button switch or the orginal leaf switch installed
The button itself, meaning what you see on top of the joy stick panel is obviously not the actual switch. The real switch lies underneath the joystick panel.
First unplug the game and then open the coin door and feel for the two clasps on the right and left of the bottom side of the joystick panel. Refer to the manual on how to open the joystick panel.
With the joystick panel open inspect the two start buttons and Fire Buttons check to make sure the wires have not fallen off or become unsoldered from the switch itself.
Re-solder the wires in their correct position; One to the “N.O.” (Normally Closed) terminal and the other wire to the Neutral. The easiest way to test these switches is with an Ohm meter reader the same way you did with the fuses.
Set your meter reader to beep when the two metal ends of the OHM reader touch each other, or in other words check for continuity. Touch one end of your reader to the normally Open (N.O.) terminal and the other to the ground or neutral. If it beeps when your press the little red button on the switch then you have a GOOD switch, if it doesn’t then the switch is bad and just needs to be replaced. The new switch will just pop right in. Once you have replaced the switch then solder the wires back on with the start Player one wiring going to the normally Open terminal and the ground going to the Neutral. Now put the button back in place and everything should be good to go! If Not check the wires coming from the PCB board and make sure the correct wires are going to the right switch. For example, the Player one start wire should be coming from the player one pin of the wiring harness to the player one start switch.
The original Galaga game has Leaf contact switches instead of Buttons. Same principal applies. When the two leafs meet, this closes the circuit and allows the electricty to tell the board to fire or start. Very Simple!
