(Topic ID: 230108)

Xenon Flipper "Machine Gunning"


By Tez17

4 months ago



Topic Stats

  • 14 posts
  • 9 Pinsiders participating
  • Latest reply 4 months ago by Homepin
  • Topic is favorited by 2 Pinsiders

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Good coil (resized).jpg
Bad distance (resized).jpg
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#1 4 months ago

Hi guys,

My father and I just recently picked up a Bally Xenon only to find when we brought it home, the right flipper rockets back and forth when held down. From what I've read I know this means its not switching to low voltage. Looking at the flipper closely I don't see anything immediately wrong with the EOS switch but then again I'm a novice with these types of things. Perhaps the wiring is bad? The left flipper holds down fine, so thankfully I would think that discounts any idea its something with a board. Let me know what you think. Can post more pictures if needed.

-Tez

46715057_201307614131643_3361186494692720640_n (resized).jpg46887656_763079874058827_3607406945318731776_n (resized).jpg
#2 4 months ago

Usually the cause of this is a bad coil. Try measuring between the middle and each outer lug while the flipper is held up (by hand, game off). If you don't have matching resistance on each side, that's your problem. Could also try just swapping the coils

#3 4 months ago

Orange wire (bottom pic) looks like a cold solder, not sure if that makes a difference. Also can you show a pic showing the EOS switch with the flipper up so we can see the gap? If the gap is too small it can cause this in my experience.

#4 4 months ago

+1 for bad coil.

#5 4 months ago

I'm going with bad coil

Look closely and see if the tiny winding wire is broken from the eyelet

#6 4 months ago

I'm also leaning towards a bad coil.

But, it could also be a bad connection to the upper half of coil. Where the brown wire comes into right tab in first photo -- it is obvious that it is making connection to the brown wire going to the switch. But there can be a bad joint between the brown wire and the actual winding wire. Winding wire is red wire seen on left side of 2nd photo.

#7 4 months ago

Here is the distance between them. Its almost identical to the working one in distance, so I think that part is ok. Will check for all the suggestions so far, thank you everyone for the quick response! FYI, Sorry for the bad focus on the picture!1st picture is bad flipper, second is good one.

Bad distance (resized).jpgGood coil (resized).jpg
#8 4 months ago

My new to me Flash Gordon's upper flipper was machine gunning. As several others have mentioned a new coil solved the issue.

#9 4 months ago

Update: we soldered both the connection that looked like a cold solder and the small wire connection. We also cleaned the EOS switch with 99% alcohol. No visible wire is broken so if the coil is bad, I'm guessing its on the inside so we should probably just try and buy a new coil than find the break. Any chance the diode is the problem? Also, it looks like the EOS switch was bent either by the machine gunning itself or someone tinkering with it before us. Not sure if it matters if its not flush. I guess my next question is, who is the best person to get the right replacement coil from?

#10 4 months ago

Marco Specialties and Pinballife are 2 of your bigger and better pinball parts places around. Can't go wrong with either one!

#11 4 months ago

Vid and the others are more expert than me so maybe they can check. The EOS gap looks too small to me. Here is a pic of how mine are set. look at the difference.pasted_image (resized).png

#12 4 months ago
Quoted from AUKraut:

Marco Specialties and Pinballife are 2 of your bigger and better pinball parts places around. Can't go wrong with either one!

Update 2: We swapped the leaf switches just to see what would happen. Same issue on the bad flipper, good flipper with the other leaf switch still worked fine. I'm going with bad coil, so we just ordered a new one today from marco specialties. Thank you everyone for the quick responses! This is my first time getting repair advice from Pinside and I can't believe how fast the response was from the community. You guys rock!

#13 4 months ago
Quoted from Tez17:

Update 2: We swapped the leaf switches just to see what would happen. Same issue on the bad flipper, good flipper with the other leaf switch still worked fine. I'm going with bad coil, so we just ordered a new one today from marco specialties. Thank you everyone for the quick responses! This is my first time getting repair advice from Pinside and I can't believe how fast the response was from the community. You guys rock!

Feel free to swap coils to confirm your suspicions too.

#14 4 months ago

Good you have isolated the issue.

Just a note on cleaning the EOS (End Of Stroke) switches in this machine.

These are high current, tungsten based switch contacts and should be cleaned and dressed with a points file - just the same as an older car that uses ignition points. Using alcohol will do almost nothing to help with the cleaning of these. In fact, it could actually cause a fire due to the spark when these points operate.

Newer machines use silver or gold flashed contacts and these should NEVER be filed as that will destroy the contacts and the effectiveness of the contacts. Newer machines use the switches to tell the control PCB to switch the coils using transistors so the switches don't do the heavy lifting. These more modern types should be cleaned with a light card dampened with alcohol and drawn through the (held closed) contacts.

Hope that helps for the future.

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