On my Harlem Globetrotters, I did a playfield swap. I'm not sure if my switches are hooked up correctly. I hooked up the yel/red strobe wire from the backbox to the left center spinner, to the bottom bumper, to the left bumper and then on to the left slingshot. according to the matrix if I follow in series, it should go from the left center spinner to the left slingshot, but the way this was wired previously that would be impossible. Is the way I have it wired wrong from the strobe? My left bumper is acting strange so I'm wondering if my strobe wire should follow a different path. Any ideas? Or could someone with a HG tell me how the left center spinner connects to the bottom bumper and left bumper?
Thanks vey much.

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Thanks. There are different paths, but I wasn’t sure how to connect the 3 switches since I couldn’t do it in series to follow the matrix column. The left bumper isn’t working and the switch isn’t triggered in switch test. But, the left center spinner and bottom bumper work fine. Maybe it’s not anything to do with the matrix? Everything is wired as it was before, except I wasn’t sure on how to connect those 3 switches together with the strobe wire as there are 2 small yel/red wires to connect them. I tried to use logic and my photos as best I could.

I replaced the cap, but would the diode cause this issue?
The bumper does work in solenoid test.
Thanks for the info on where the connection goes on the MPU. I will check the connection there for continuity. Makes sense it might be that.

Thanks. Good to know I have it wired correctly. I was just at a loss as if the signal had to somehow follow the switch matrix chart. Since it's running in parallel to other switches on the same strobe column, I guess it can only run in sequence so much. In other words, it's not a perfect series.

How would I do this? The switch is spaced correctly but it doesn't show in switch test when I manually close it. I'm going to work on it now. I will change out the diode.

Thanks very much for this.
I just found that the diode on the left bumper is in the wrong direction. It wasn’t me since I didn’t change those out.

Maybe that’s the issue, but if not, I will check the rest out.

Wish I would have seen that before posting, but putting a new diode in the correct direction fixed it. I do appreciate all the help.

Thanks!

Here's another issue I could use some help on. If you look at the matrix, I was having the the right sling fire when both the first and last drop target were down and I hit the left center spinner. On the matrix, I figure its a bad diode. So, I replaced all the diodes on those 4 switches. Problem is, that must not have been the issue because the right sling still fires under the same circumstance. What am I missing? Is there another box I could make from the switches?

Thanks!

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Bump

They all work and give the correct switch number.

I’ll see if there could be any shorts in the wiring with those rows.

Thanks.

Thanks Quench. I checked there, and there doesn't seem to be an issue. Should I check the strobe line up to the backbox and check for any short possibilities? One thing I did do, which I didn't think would be an issue, but may be. The bare wire that connects the drop targets broke on the D target. I wasn't able to re-solder it, so I cut it and replaced the wire from C to D with the same bare wire I use for the lights. Was this a mistake? I wouldn't think so, but wanted to mention it since it is the target that you said is the culprit.

Bump for the evening.

Ok, I’ll do that. It’s the last drop target in the line. Here’s a photo.

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It reads .4 resistance if I did it correctly. Is it just putting the probes to each lug with the wires? Forgive me but I’m not experienced with measurement stuff except for voltage and testing diodes.

Here’s a couple more photos. Not pretty I realize, but it’s tough to get in close to the back target. Will re do once this is solved. I’m anal retentive about good soldering. Everything is separated and not touching the cage.

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Here’s a couple of others. Looks like an isolator is there?

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They could be sandwiched together. I’ll have to disassemble to see.

Ok, I’ll take it off and get that insulator in between them. Ill follow another of the switches as a guide. I’ll also clean it all up and resolder correctly.

Thanks very much for your help!

That was the issue Quench, thanks for pointing it out. All is good now! Thanks to you and Emsrph for your help.