Hello all-
First, thanks for any help that can be provided.

I'm a bit stumped on a 1976 Royal Flush bonus problem. First, when you knock down the drop targets, the correct white lights illuminate on the playfield. However, when the ball drains (in the outhole), the arrows don't work correctly - the bonus isn't properly scored. Sometimes it starts with the 3000 yellow arrow and then moves to 4000 and 5000, and they score correctly. But it skips the 1000 and 2000 yellow arrows. Sometimes it doesn't illuminate any of the yellow arrows. Other times, it works as one would anticipate.

I'm stumped. I pulled the AS relay (relay "I") and cleaned / rebuilt it. It's smooth as can be, and doesn't hang. There are two switches on the top of that AS relay that I *think* are adjusted correctly. What's a bit odd is that at one step point, one of the contacts moves some, but not the full travel distance. I'm not sure if that switch is supposed to be closed or open at that point.

I'm struggling to understand how it's supposed to work by reading the schematics. I'm more of a digital guy.

Hoping someone here knows how it's supposed to work, and maybe can provide some guidance.

Again, thanks in advance for any help that can be provided.

James

Correct, it skips the 1st and 2nd bonus, even if they should have been scored.

Thanks for the schematic, I'll inspect the switches that you highlighted.

Funny thing about this game. I'm fixing it for someone who contacted me online and said he couldn't find anyone to work on it. I offered to try and help. I've got most of it working, short of this problem. He works at a print shop and printed the schematic out on a sheet of paper that is about 9' tall. No joke. He printed two copies, one of which is hanging on the wall in my office. Fun to look at, although EMs can make me want to pull my hair out!

Thanks again, I'll check it out next time I'm at his house, and will report back with my findings.

Thanks,
James

So I'm looking at that schematic, and I'm not sure if it's the problem. It looks like it is responsible for scoring the bonus points. Thing is, on this machine, it doesn't step through the 5 bonuses (1000, 2000, etc.). Often it starts on the 3000 bonus, skipping the 1000 and 2000 bonuses. In other words, at the start of the bonus feature, the yellow 3000 arrow is the first to light up, skipping the 1000 and 2000 bonus arrows. Does that make sense?

I suspect that the AS "I" relay isn't resetting to the proper position. But I'm not sure what causes it to reset at the beginning of each ball....EMs...grrr! =)

I think this is the path I need to inspect. I think....

image (resized).png

And just in case anyone thought I was kidding about the wall art.

WallArt (resized).JPG

I made some more progress on this, and think I found the real issue. On the "I" relay (AS relay for the bonus feature), there is the "zero position switch". It's *supposed* to open the the AS relay is at the zero position. Yet, on this machine, the cam for the switch appears to be incorrect. It has 4 positions that will open the zero position switch, while I believe it is supposed to have 2 positions. In other words, the wiper arm is at the zero position twice for each full rotation. So logically I would think that the cam also should have two positions per rotation where it opens the zero position switch - when the armature is at the zero position.

To be sure that nothing else is causing the issue, I jumpered across the zero position switch. When the score motor turns (during the bonus feature / reset for next ball), the AS relay consistently steps to the next position, many times of course since motor switch 1A pulses so frequently. My point being, I'm confident that the other switches in the circuit are working correctly.

So the mystery begins - what is the proper cam? I don't see it in the manual. How do I go about getting the correct cam / part #?

TIA!

Thanks, I'm actually referring to the other AS relay (bonus relay).

Alright, I think I got to the bottom of this.

Playdium, thanks for the info. I looked at The Pinball Resource site and concluded that neither are two-notched cams as I anticipated.

So....in further looking at this. I think the wiper disc actually have 2 zero positions. In looking at the disc, it has 10 positions. I *think* position 0 is wired to position 5, 1 to 6, etc. So in reality, there are 4 "zero positions" for the armature, or 2 zero positions on the disc, if that makes sense.

I still think I am dealing with an incorrect cam. At least I *think* I have my head wrapped around the issue...