Indianapolis 500
Bally, 1995I have a perplexing problem with my Indy 500. The rear-most stand-up/light-up target often fired when I engage the right flipper button. It also sometimes fires at random when the machine is at rest. It otherwise nfires appropriately when hit. It does NOT fire if I give the machine a good nudge. It is most bizarre to me that the flipper seems to trigger it. Any tips? I am hoping to avoid having to replace the opto...
The stand-up/light-up targets use an opto. This could get dirty, or possibly weak.
Disassemble, clean the optos and reassemble. I use a q-tip with windex.
Right now it looks as though you can't buy part number A-20401
So don't break it!
Check the pins on the board to the connector soldering very carefully for cracked solder, you might want to reflow the connector while you have it apart.
It's not uncommon to have to replace the plug connector to these switches. The IDC type connectors can be shaken to the point they make intermittent connection.
If the phantom triggering persists, take one of the other stand-up/light-up targets and switch places. If the problem follows, you've got a problem on the original target. If the problem persists in the same way with a different target, you've got a wiring problem or possibly a switch matrix problem.
Let us know what you find!
Quoted from UNCgump:I have a perplexing problem with my Indy 500. The rear-most stand-up/light-up target often fired when I engage the right flipper button. It also sometimes fires at random when the machine is at rest. It otherwise nfires appropriately when hit. It does NOT fire if I give the machine a good nudge. It is most bizarre to me that the flipper seems to trigger it. Any tips? I am hoping to avoid having to replace the opto...
In addition to the good advice already provided here, could you please clarify in your question whether by "fire" you simply mean the lamp flashes, or you mean that the target score is actually awarded as well.
That detail can help others who are less familiar with the general problem to both understand the problem you're having, as well as compare notes if they have a similar problem in the future.
Thanks!
Quoted from pete_d:In addition to the good advice already provided here, could you please clarify in your question whether by "fire" you simply mean the lamp flashes, or you mean that the target score is actually awarded as well.
That detail can help others who are less familiar with the general problem to both understand the problem you're having, as well as compare notes if they have a similar problem in the future.
Thanks!
It lights up, makes a sound, and awards points all as though it were hit. The switch others functions normally when triggered by hand with the glass off
I'll dig into it again soon and see what I can figure out. I may have to call in a friend with more experience, since I'm pretty naive on this stuff, especially electrical issues. Thanks to all for the thoughtful and helpful insights!
I would start by measuring 12v power at that target switches opto board and report back.(Pin 1 is 12v)
Quoted from PinRetail:Right now it looks as though you can't buy part number A-20401
So don't break it!
They are available , pinball centre has them ... restored an Indy recently and replaced all 3...
Quoted from transprtr4u:They are available , pinball centre has them
Good catch! For US buyers Pinball Center will not directly ship to the USA, so it's a little harder for us to get these parts than it is for you in Alberta Canada.
Pinside user Zitt has made truly heroic effort to arrange parts shipping from Pinball Center, here is his thread, for anyone who needs parts that only Pinball Center has.
https://pinside.com/pinball/forum/topic/pinballcenter-parts-needed
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Kalamazoo, MI
Edmonton, AB