Hey everyone,

I have a couple issues on my independence day that are stumping me.

Before I start let me say the boards are brand new in this game. Installed a week ago.

it is shooting 2 balls into the lane everytime. Is this just that the trough switches need to be adjusted? I was messing around with them last week for a while and before it would say "4 balls missing" then find them, and now after some adjustment I get this issue. Its weird too because i can drain one of the balls and the game will let me continue to play until the 2nd ball drains.

I Tried adjusting switches and still no change. They all work great in test mode. Or is this the optos?

Also i have another strange issue where the top right pop bumper gets hit and pops but the right sling shot goes off too. And the right sling will not fire on its own when hit but does score. In the test mode the right sling still will not fire by itself, but both fire when pop bumper is activated in test mode.
ALSO If I ground the Q13 transistor then my right sling fires correctly. If I ground the Q11 transistor then my right pop bumper fires correctly and DOES NOT fire the sling.
So why does this not work correctly in test mode or gameplay?!

And the last little issue. The top left rollover light (letter i) and the middle alien ship (for multiplier bonus) lights do not work during gameplay. But they both work in the attract mode.. and these are new LEDs, and i have switched them out with same results

Anyone have any thoughts? Im kinda at a stand still

I attached a pic of the boards. Bottom board is new rotten dog. Top board is new stern cpu 520-5300-00 rev a

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Anyone!

One of my opto boards was flaky (if I pressed on it the light would go out) I resoldered it and its no longer going out with any movement. It also works exactly as it should in the test menu. I am still stumped on the pop bumper/sling shot issue. The wires are correct everywhere. Could this be a rom issue? I do not have the original roms, so I will buy another set if this could help.

And all my lights work in attract mode. but having issues with the left inlane (combo light) and the middle space ship (for bonus) during gameplay they dont work.

Got the correct coil for the trough. Didnt help. Ordered the opto boards for trough a minute ago. Hope this fixes the 2 ball issue.

Still no clue where to go with the pop bumper/sling or lights.. If anyone would reply that would be awesome.

Thanks for the reply though! Optos come tomorrow. Just hope that narrows down one issue

Of course my package has been delayed. Sent to 3 different states when it was at one point 25 minutes from my house. No clue if im even gonna get it at this point.

So just gonna try and bump this thread in hopes someone sees it and can help

heres where I am at now with the new optos

The leds I have now (Old Optos) are Super bright and work exactly as they should in the test menu, BUT my game is constantly firing 2 balls into the shooter lane though.

I bought a brand new set of optos and they are not as bright of an led, and do NOT show up in the test menu no matter what I do (block light or not) The game fires only 1 ball into the shooter lane, but it also fires one ball in the UpKicker which does not kick the ball up. SO the problem with this is that the game doesnt know the ball is in the upkicker and when a ball drains it only activates 3 of the 4 trough switches and then has to do a ball search.

Are the new optos faulty? Is something else to blame?

I will check the apron in a few minutes, The optos are both really clean

The sling and pop issue, the wires on the coils are correct according to the manual, one of them is like blue and green and the other is blue and orange. its wired correctly at the plug on the board and wired correctly at the coils. What about the grounds? Could it be something with that?? I have tried to go through the harness and havent seen anything out of place or broken

Well I actually checked the gap, Both of the switches score points but do not fire the sling. Also like I said its doing this in the test mode. where if I fire the pop it will fire the sling, but the sling will not fire on the sling test.

Looks like its split on top on both sides.

Can I ask what this would cause?

I can jb weld this back to normal right?

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I really apprecaite all the help!

I will get this scoop solid and see if it helps

I know how to check for continuity with a meter, but how should I specifically check it on the control wires?

Damn I just put this in!! How do I check

I bought another set of new optos. They are doing the same thing the other new set does. Not work.

They will not show up in test menu at all. They kick one ball out to start the game snd then send a ball into the trough upkicker but do not fire it into the shooter lane. So now a ball drains and since only 3 balls are in the trough it wont find the drain.

Also with these optos the vuk on the right side of playfield fires every 5 seconds.

I have no clue where to go. The old optos everything works correctly except 2 balls into lane. The new optos do not show up in test menu at all and cause 10 other issues. Im about to post this for sale with all the parts.

Also installed new roms with no change to anything

Can someone post a pic of there trough and how the optos are wired please.

And now i notice when i hit the start button it gives me aliens. Which are rhe loop on the left. I have multiple targets scoring and the VUK firing randomly. No clue what happened but I have a lot of issues all of a sudden

Unfortunately not. I feel like its past my expertise of repair. I have not touched the game since last post. I think last time i turned it on i had more issues than before. Its really upsetting when u spend 1000 on new boards and shit still dont work

I have shorts somewhere in the wiring. When i hit the start button it scores the top left rollover. Its killing me. I cant find a single hacked wire anywhere