I have a Space Invaders that I recently brought back to life. All new Alltek and weebly boards. All new connectors and all repinned. Game has been working great, been playing it for the last 5 days with no issues.

I ordered flipper kits from Big Daddy to try and restore some pop to them...rebuilt the lower right one tonight, rewired using photos I took beforehand to make sure I got it right. Put it all back together and turned on game, got about 6 flips in and F4 blows. The flipper definitely had a nice pop to it, but I am at a loss as to why the fuse would blow now? The kit I got only had one part of the switch, which I assume to be the EOS switch, the other part of the switch still has the old leaf on it. As far as I can tell the switch is adjusted to work the same as all the others, with a 1/8" gap when there should be a gap.

I messaged vid because he made the awesome flipper rebuild guide that I used to help me prepare for this, but thought I should post here as well. I have attached some pics, but the lighting isn't that great. I was trying to show the gaps before and after, along with a view of the assembly. I was in the middle of desoldering wires so the solder work will not look right, I did make very sure that there were good connections everywhere

Can anyone think of anything I may have missed? I think either I need the right switch(es) or I have missed something obvious.

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Hmm after looking at these pics on this post, it just occurred to me in my haste to test the rebuild I have no shaft/flipper in the top right. I have a bad feeling that was what I missed. /facepalm

Thanks...I am actually going to rebuild all four flippers. The only reason that shaft was pulled out on the top is because the game came to me with 3" flippers on all four, and I am putting the top ones back to 2" flippers. It simply didn't occur to me that I would need them in there for the solenoids to not overload. Lol can you tell I am new to pinball repair?

I was kinda wondering why those were on there myself. I would like to simply replace the entire switch, if I could just figure out the part number for them.

Oh and yes, new rectifier board and connectors, that was the very first thing I did. I did notice though that the fuses that came on that new board are mostly the wrong ones *sigh* so I am kinda glad this happened so I could fix that oversight.

If by flipper switches you mean the buttons and switches for those, yes. If you mean the stroke switches no I am still trying to find part numbers to replace them entirely.

Totally agree re: sacrilege, I was like why even bother doing that it's not like 2" bats are hard to find ugh.

https://www.marcospecialties.com/pinball-parts/A365-00046-0000

This seems to match what is on the top flipper assembly, but does not look at all like the one on the bottom. Would/could I use this switch for all 4? That would take out all uncertainty of the switches for me.

Now that I have had some coffee and time to think about this a bit more, thinking of the bottom set of switches, the second part of the switch stack is what activates the top flippers. Wouldn't the top flippers need the diode to prevent feedback into the wiring or something? I am trying to think through this logically, again understanding I am new to pinball repair. I just don't want to pull these diodes out and have my apartment go up in a mushroom cloud

Looking at other Space Invaders pictures it appears that diode is there as well.

http://www.gandalf.net/gamesforsale070108/Space%20Invaders%20Pinball/DSC03186.JPG

No worries, I do appreciate the help, really. I wasn't going to remove the diode after seeing that pic and wouldn't have without getting confirmation elsewhere so no harm done.

In good news, I found some 5A fuses to put in F4, rebuilt that top flipper, and I am back in business. Thankfully it was an easy fix, and hey I learned something new today.

Thanks again, and on to the next problem lol.

As an aside to this since it came up during the thread, and in case someone finds this in the future. The reason the diodes are there are for the low power EOS switches on the upper flippers that make the firing sound when you press the flipper button. I do not know if they need_ to be there, but on my game the left one had no diode and wouldn't make the sound. The right one has the diode and the sound works. I think most people turn that sound off, but I intend to replace the entire switch stack with the diode in place.