Hi all

I'm having a small issue with my Space Jam and am looking for a solution.

When I start it up, it always says "1 ball missing" whether its true or not. I went into the switch matrix test to verify all of the switches. First I looked at the issue with it fully loaded, then I loaded the balls one at a time to see if I could identify the problem.

When they are loaded one at a time, it identifies the first four seemingly fine (switches 11-14 activate) but when the 5th ball is loaded, switch 15 activates as "on" but correspondingly switch 11 turns off even though there are 5 balls loaded in there. I would assume they all should be on when fully loaded.

Any suggestions on the issue I'm having? Bad ground? Bad diode? Bad opto?

Thanks in advance for the help!

I can physically activate the last switch manually (#15) and the minute that switch is activated, #11 goes off......it's weird. The switches themselves seem to be fine but It seems like one is cancelling out the other.

Nope, haven't worked on it in awhile. Getting cold, so I've been focusing on my games in the basement. Although I have some vacation time coming up so I'm sure I will get it resolved then.

I made a video of the issue, please take a look and let me know.

Opto's were replaced as were the switches underneath. Notice in the switch test.....just weird.

http://s1206.photobucket.com/user/dkazz111/media/Space%20Jam/9555B0BF-AF27-481A-B902-F0C5743BFB18_zps75zg1wlu.mp4.html?sort=3&o=0

Anyone?

Watch the video. It's weird. Don't know if it's a crossed wire or what.......as I drop the balls in one at a time, it recognizes every one. But then the opto one falls off the minute the last one is activated.

I will give it a try tomorrow. Thanks for the tips

Just tried that out. The minute you have all 5 switches active, the one by the optos goes off, regardless. I intentionally tried tricking it like you had suggested, just having the last switch depressed then putting my finger by the opto, that was no problem. Then I would activate the other switches randomly, still no issue until I had the fifth active. Then it recognized all of them EXCEPT the opto one.

Correct. All switches except the opto at end that kicks ball up. I think I found the issue. Looks like a diode missing on the lane shooter right next to the trough. Will let you know....

Hmmm well that didn't work....the other thing I noticed is when the trough is loaded with all five balls and you manually activate the shooter lane switch, it keeps turning on/off instead of staying on. I have a feeling all of this is related......ugh....

I'm uploading some pictures of the switch in question to my photobucket stream. Will post pics shortly.

Here is the pic of the switch that I question (ball lane switch). It goes nuts when all five balls are in the trough and then this one is activated. Wondered if it's as simple as the wiring is reversed.

http://s1206.photobucket.com/user/dkazz111/media/Space%20Jam/935E628D-358D-4238-9722-83609FEF6524_zpsw3zg1vfk.jpg.html?sort=3&o=1

Sorry about that. I'm not the electronics genius. But I better figure it out. lol Looks like someone did a repair on that switch and didn't hook the wires up directly. All those switches are on the same column so I assume the reversed wire could be the source of the problems.

Appreciate the help!