I have a Sure Shot pinball that is now giving me problems after I replaced the flipper coils. Prior to replacing the flipper coils the issue was not present. I'm new to EM's so my troubleshooting abilities are very limited. I also don't have any schematics for this game, not that it matters because I still don't know how to read them quite yet.

Here is what happened. I replaced the left coil first, put the PF down, turned it on and tested the left flipper and this indeed fixed my weak flipper issue. Left flipper was now twice as strong as the right flipper. OK, no problem I thought, let's swap out the right flipper coil, which I did. Put the PF back down and when the game started it was making this awfully loud buzzing noise. After a few game resets I determined that when the game starts it instantly activates balls 6 & 9 as those roll over lights go out and balls 6 & 9 light up on the rack in the center of the playfield. With the PF lifted up I reset the game and I can see where 6 & 9 "lock on" as soon as the game starts but I have no idea how to fix it. I'm 99% sure it's coincidental that the game stopped working after I switched the right flipper coil, however I should ask is it possible I soldered a wire onto the wrong lug and this could be causing the issue? Other than that I have checked rollvers for 6 & 9 and I can't see anything out of the ordinary, nothing looks loose, broken, or stuck. I've attached a short video link to Youtube that shows the problem. Any advice for someone clueless like myself would be appreciated.

Here are pictures of the 6 & 9 rollovers.

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My game is from 1976, if I'm reading everything correctly my game doesn't have a reset bank.

I'll look into those suggestions tonight. Just to be sure, the game has played flawlessly for weeks until I changed out the right flipper coil. I know EM's can be finicky, but I just want to make sure the flipper coil has nothing to do with the issue.

I inserted paper between both switch contacts for rollover #6 and rollover #9, but still had the same results. I also loosened the wing nuts and tilted that entire mechanism forward and looked over everything and couldn't detect any oddities. As for the paper wedged in between the switch, see attached picture to make sure I placed this in the proper position.

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I did not have time tonight to unsolder any wires. Might try and get to that tomorrow. No schematic yet.

Great observation! I'm still trying to get the hang of soldering better and I did notice several pieces of solder dripping when I did the right coil. I didn't have any issues on the left side. I will check this out tonight! Thanks for spotting this!

Chad

Winner winner! That was the ticket!! Much thanks on spotting that! If you make it to the First State Flip Off I'm hosting in September I'll take care of your beer, that is if you drink!