(Topic ID: 266416)

Stars single drop not scoring


By Slips

80 days ago



Topic Stats

  • 9 posts
  • 4 Pinsiders participating
  • Latest reply 75 days ago by frunch
  • No one calls this topic a favorite

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Linked Games

  • Stars Stern Electronics, 1978

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7285B0D2-9924-4776-A38D-6A58BB0E0053 (resized).jpeg

#1 80 days ago

Still new to pinball repair. I have a Stars with pretty much everything functioning except the far left drop target is not scoring and the bank won’t reset after all 3 are down. The other two targets in the left bank work fine. I’ve tried cleaning the contact and looking at the wire connection but that’s pretty much the extent of what I’ve done.

Any help is greatly appreciated!

#2 80 days ago

You should look at the switch matrix diagram and see what other switches are in the row and column shared with that drop target switch. A broken wire somewhere else in the chain of switches going to or from the backbox could cause that switch to malfunction.

If all look good, then press the drop target switch closed and measure continuity between the two metal lugs on the switch with your multimeter. If that shows a good connection, then it could be that the connector going to the board needs to be re-pinned.

Just some thoughts. Take a closer look and report back.

#3 80 days ago

Follow the wire color back to the MPU board. Wiggle the wire and see if anything changes. Might be a bad pin or bad solder joint on the back.

#4 76 days ago

Drop target 3 looks like this and it shares a row on the switch matrix. Is this bad?

7285B0D2-9924-4776-A38D-6A58BB0E0053 (resized).jpeg
#5 76 days ago

I would desolder and remove the wire, clean the lug, and cut and strip the wire so you can solder a fresh piece on. See if that helps.

#6 76 days ago

Is this something you’d recommend a beginner to do? I’m down to learn but I want to make sure it’s the right move first. This drop target is working fine by the way, it’s only the first drop target that’s having trouble.

#7 76 days ago
Quoted from Slips:

Is this something you’d recommend a beginner to do? I’m down to learn but I want to make sure it’s the right move first. This drop target is working fine by the way, it’s only the first drop target that’s having trouble.

Well, if you own a pinball machine, you are going to have to solder something at some point. 6 years ago, I didn’t know how to do anything, and was paranoid about messing stuff up, so I get it. That said, you need to learn as I needed to, and soldering a wire on a lug is one of the easiest things to solder. Too bad you’re in a different state and there is a global pandemic, otherwise I would come over and show you how. I’m sure there are lots of pinsiders in the Chicago area that would be glad to help if there wasn’t a pandemic.

I would suggest watching a few YouTube videos on basic soldering. Perhaps practice with some spare wire outside of the machine. Then give it a try. I would also be willing to FaceTime with you and walk you through it, but that might be difficult to get the camera in the right position while you’re holding wires and a soldering iron.

#8 76 days ago
Quoted from Nokoro:

Well, if you own a pinball machine, you are going to have to solder something at some point. 6 years ago, I didn’t know how to do anything, and was paranoid about messing stuff up, so I get it. That said, you need to learn as I needed to, and soldering a wire on a lug is one of the easiest things to solder. Too bad you’re in a different state and there is a global pandemic, otherwise I would come over and show you how. I’m sure there are lots of pinsiders in the Chicago area that would be glad to help if there wasn’t a pandemic.
I would suggest watching a few YouTube videos on basic soldering. Perhaps practice with some spare wire outside of the machine. Then give it a try. I would also be willing to FaceTime with you and walk you through it, but that might be difficult to get the camera in the right position while you’re holding wires and a soldering iron.

Thanks so much. I’ll let you know what I decide to do.

#9 75 days ago

Just to be sure, these 2 solder lugs aren't touching by any chance, are they? It's hard to tell by the angle of the pic.

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