Space Invaders
Bally, 1980You're currently viewing posts by Pinsider Breger1.
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I have a SI I've had for about a year. I've never had any issues until recently the horseshoe stopped scoring, it will intermittently pick up the ball rolling across. But if it is going it too fast the switch doesn't register or score. Therefore, I replaced the leaf switches, but it continues to do it, any thoughts? I made sure the switch gap was barely open to make sure the rollover button would register.
Quoted from wayout440:The switches should have .047uF capacitors across them. Sometimes they are clipped off because if they became shorted they would stop the switch from working correctly. I noticed this problem on the horseshoe of my SI, but the targets as well. I added the caps to all the target switches as well as the horseshoe switches on SI for the same problem. The .047uF cap should be soldered across the switch. This allows the cap to "stretch" the pulse of a quick switch so the MPU has a better chance of reading the switch closure.
thanks for the advice, I have read to cut the capacitors, but this makes sense. Which leads are the soldered to?
Quoted from wayout440:The switches should have .047uF capacitors across them. Sometimes they are clipped off because if they became shorted they would stop the switch from working correctly. I noticed this problem on the horseshoe of my SI, but the targets as well. I added the caps to all the target switches as well as the horseshoe switches on SI for the same problem. The .047uF cap should be soldered across the switch. This allows the cap to "stretch" the pulse of a quick switch so the MPU has a better chance of reading the switch closure.
Put new capacitors on the switches last night and works perfectly every time. thanks for the advice! It had been a frustration of mine and machine working great now.
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Clinton, MO