Symptom: When a ball is served to the shooter lane or either flipper is triggered I get 10 points. The points aren't as annoying as the sound it makes every time.

Tried:

Switch matrix test shows switch 34 is closed. This is the 10 point switch to the right of the right pop bumper. Just below the green target.

The switch does not test closed. I unwired it and it still reports closed.

I temporarily swapped in an alltek mpu and it has the same issue. I also have a rottendog SDB installed.

I don't fully understand the switch matrix yet but looking at the diagram it looks like I should check the diodes on: both flipper buttons, left side rollover, and the right slingshot. (not sure the direction the matrix scans so I'll check them all)

Am I on the right track?

Thanks

Just bought the game Sunday and the rubbers look pretty fresh.

This was it. I checked and adjusted these switches. Second one I tried was the problem.

Thanks for your help and for the knowledge about the re-used switch locations!

Yep this one is marked (5) but without any indication of what that means.

Thanks again!

Solving 1 problem brings up another. Dropping the O orbs target causes the 10k target to drop (sometimes the 20k too). As long as the O target is down the right flipper and sometimes the left causes the 10, then 20... 80k targets to drop. When all down they reset and then the flipper continues to drop them in order.

This one had an easy clue though. It looked like the spot target was being triggered. I looked at the spot target and the cap was shorted. Removed the cap and the problem went away. I need to order up some diodes, caps and while I'm at it get a few of the SCRs for the lamps I have out.

progress is being made.

Ok, now I have another weird set of issues. I replaced several scrs on the lamp driver board and since then something weird is happening.

In switch test the right outlane reports switch 5, it goes right to left (r inlane 6, l inlane 7, l outlane 8). They should report 45 through 48.

In play they cause the following actions:
R outlane causes the right sling to fire, r inlane the left sling, l inlane cause tilt and l outlane the slam tilt. These are switches 37, 38, 15 and 16.

I've got a load of replacement diodes but I don't want to shotgun it. I've researched matrix troubleshooting and drawing the box but it doesn't seem to lead anywhere.

Anybody have any troubleshooting advice?

Unresolved this topic. Goes deeper than expected.

I don't have diodes on my tilt or the coin switches. If they should have been there how has it been working?

Here's the switch matrix and the switch numbers

In Play
R Outlane (45) triggers R Sling (37)
R Inlane (46) triggers L Sling(38)
L Inlane (47) triggers Tilt (15)
L Outlane(48) triggers Slam (16)

In Switch Test
R Outlane (45) triggers Top L Lane (05)
R Inlane (46) triggers Credit Button (06)
L Inlane (47) triggers (07)
L Outlane(48) triggers Outhole (08)

Thanks for your help

Switch_matrix_(resized).png

Switch_Numbers_(resized).png

Ok additional data:

In switch test 45 activates 05 only, 46 does 06, etc... Holding down te switch does not indicate other numbers.

In play switch 45 (r outlane) activitates the outlane, switch 37 (r sling) and 29 (S drop target).

Switch 46 (r inlane) does the same with the next row (l sling, b drop).

The box theory doesn't help here since they're all on the same row.

It doesn't act like an entire row failure since the switches are registering.

Ok if I assume this is entire rows triggering and not just switch issues then I have a short(s) somewhere. This will be easy enough to test as all I have to to is test continuity on any affected row(s) switch to ground. It's weird that it's 4 rows but I'll check that next.

Update: couldn't find a short on the lane switches. I was able to verify that all switches on those 3 rows are firing when the last switch in the row is triggered. No other switch in that row does this.

Still digging.

I thought it might be mpu but the same issue happens with an alltek board.

I should have been more clear. The game play numbers have the balls in of course. The switch test numbers are all balls removed and all drops up.

I have a logic tester. I'll check this out. Is it likely though that I'd have this problem with a bally board and an alltek?

It's new to me. It worked for most of a week but I had several controlled lamps out so I replaced the affected scrs. That fixed the lamps but led to the problem.

My guess is lifting the playfield out might have caused some issue. I've tested the switches and don't have any grounding. Next to test continuity from switch to switch.

I need to do some research on how to use the logic probe to check the column strobe

4 updates.

1. I have some damage to fix. I worry that if both grounded it could feed GI voltage to the switch matrix.
2. I have verified the issue affects all switches in a row when any switch in the last column (#6) is triggered
3. Did a simple logic test. All of the columns behave the same way (vid attached)
4. Put my alltek in xenon and it works fine. BUT! Xenon doesn't use this column, D'OH!

2016-01-21_10.05.49_(resized).jpg

p.s. Sorry for the shaky cam

Ok figured out my test issue. Column 6 comes off a different connector.

Here's an updated video. It does appear dimmer

Thanks CactusJack, I will try this out

We have a bingo! Thanks to you CactusJack for the final solution! I'll repin those connectors.

Also thanks to Terryb and Vid1900 for the help with the first issues.

Pinside is great because of pinsiders like you guys. If I can find a a way to donate to pinside in your name I will, if not I'll just donate again.

Thanks again!