Hello all - hoping this is a relatively simple fix, been trying to figure it out. Bally Campus Queen, been working great for a while now thanks to advice in previous threads. Ran into an odd issue today with scoring:

There are (6) Mushroom Bumpers in this game, numbered 1-6. When hit, they each score 50 points, and also trigger various gates depending on what combination of bumpers have been hit. Currently, when the bumpers are hit, they properly illuminate the correct items on the playfield, and the gates function perfectly. Everything that is supposed to happen/trigger is, with the exception of scoring. The issue is that the 50 points that are supposed to be scored are not registering. I found it odd that none of the 6 bumpers are registering the scoring, so the issue is clearly linked to all of them.

I've attached the relevant section of the schematic. Thoughts on what to check?

Color Code for reference: 1-Red, 2-Blue, 3-Yellow, 4-Green, 5-White, 6-Brown, 7-Orange, 8-Black, 9-Gray

Mushroom_BumpScoring_(resized).jpg

When I manually trigger the 50 point relay, it works fine (chime and scoring). Seems like there's no communication from the bumper relays to the 50 point relay to trigger it. Since it's the same issue for all of them, and they're part of a relay bank, I'm wondering if it's something they have in common.

I've only located one 50 point relay, which is odd since the schematic shows two. Going to go through this morning and search again, perhaps it's unlabeled. The relay I located is on the main board, far back right when looking from the player position. It's part of the long series of relays that line that side of the cabinet. I believe it's next to the 100pt relay and the Series relay, but I'll double check.

I'll also check the wires/connections mentioned above and reply back. Thank you all, more to come

Seems to be working again... here's what I did and the results.

Okay, so I went through everything mentioned, and all the connections seemed okay. I found the other 50 point relay (it was next to the existing one, the label was just knocked off (/facepalm). I couldn't find any issues, but since I had cleaned everything and checked connections, I started it back up. Still no scoring on 50 pt mushroom hits. I manually tested the first 50 pt relay and scoring functioned. Then I tested the second 50 pt relay, and it didn't do anything.

At this point I realized that (assuming I'm getting the sequence right) the second 50 pt relay is designed to function only when the first one is active. The idea being that quite frequently two mushroom bumpers can be hit almost simultaneously, so they needed a way to ensure you could still score the second hit while the first was finishing its coil pull and release. I tested this by pressing the first 50 pt relay and then the second 50 pt relay immediately, before the first finished it's scoring cycle. Sure enough, the second 50 pt relay worked. The nearby "series" relay seems to be involved in this process too.

Here's the strange part: me triggering the sequence manually seems to have corrected the issue. All of a sudden, the scoring works again, and there are no issues. It's possible something I cleaned or manipulated manually eliminated the problem, but it almost felt like I "reset" the process by triggering it manually, and now it's fine. Very strange. I'll have to see if it happens again soon, and if so, really take a look at everything to see what's going on. Played about 10 games, no problems, so I'm going to leave this as solved for the moment. If it comes back, I'll post.

Thanks all!

Hmmm, I'll take a look Rolf and post when I have a chance. I closed it all back up since it was working, but I'll re-open and take a peek (and see what else might be relevant to your questions on the schematic.