So I've been trying to resurrect a JS and I've reached a roadblock. When I got the machine it would not start up and was blowing fuses. Fixed numerous dirty contacts, switch adjustments and other things and it now starts up perfectly, kicks the ball out and then the playfield goes dead, no lights or flippers or scoring. It appears like the anti-cheat switch has been activated but I checked the switches and they are correct/working.

Couple of other things to note.
1. This is my first Gottlieb 4 player machine (figure that important, LOL)
2. Lights on playfield work fine during startup
3. Ball one comes up on backbox, but will not advance to ball two when manually put ball in kickout
4. Tilting the machine works, lights come on, tilt light comes on and game ends
5. Can't add players: when ball is kicked out and replay button pressed the machine just resets.

Think that's it.

What I'm not 100% sure about is what relays should be on at that time. Tried manually activating AX but that doesn't solve the problem. Can't seem to wrap my head around this, maybe someone else has an idea of where to look.

Thanks in advance.

That could be it (1st Ball Relay- U). I'll check that again. Think I looked at that already but as you said, they can be a bit of a pain.

Thanks

Game Over is displayed only after Tilting the game. Tilt light appears also.

Yes, pops blink and all playfield lights are on. When ball kicks out all lights go off.

I'm not at home now but I know the R relay is pulled and I believe the H relay is also but I'm not 100%. I'll check later.

Thanks Rolf

Right you are rolf_martin_062 and @currieddog, H is not pulling in. Manually do it and pin works, BUT it won't stay. So the connection to H is through Tilt Relay (T) switch (tested fine) and AX (switches test fine). So AX relay latch won't hold. I'm guessing this should be latched but when AX is manually engaged it latches, then runs the score motor and unlatches. Just need to trace that.

Thanks guys, making headway.

Getting closer.......I think.

Yep, that's fine. Checking the path to U now, checked switches at M, N, O and R. All are ok.

Stumped now.

@rolf_martin_062 Checked all of the connections on the light patch you circled and they are all good.

I'm assuming that P1 could be any of the 6 switches on the player unit 1st Cam. They all checked out ok.

I've been down most of this path before, I think I got so frustrated I lost track of what I did.

Still stumped.

That's it @rolf_martin_062!! Make break switch on H was not fully touching. That explains why it would "buzz" a bit when I manually would engage it. Just had too much resistance to pull it in all the way. Makes total sense now.

Thanks a bunch guys, appreciate the help.

So the pin starts up and plays well BUT does not advance to the next ball. So basically I can play forever.

Ball 1 lights but on second ball it goes out and nothing shows on backglass, again it keeps spitting out balls.

I can add all 4 players but only player one scores.

So basically the player unit isn't stepping after startup I assume. Checking it now.

Yes, it activates after ball one drains and trough switch is activated.

Just checked. Yep, the player unit is doing exactly what it should. Steps 4 times for one player, once for 4 player.

Howard, see you're in Boulder. My son is a Freshman at CU. Great place.

Thanks for the help.

Todd

Here's what I can't seem to find on the schematic. Here' what I'm assuming, but I may be wrong.

The ball count is not advancing, but the player unit is working correctly, steps exactly what is should for the number of players. The question is, does the player unit control the ball count or is there another relay that does this through the player unit?

I checked BX and from what I can tell it is working correctly

I'm almost there....Thanks

Yea, I saw that but wasn't sure if lights and actual ball count were the same thing. Guess I was just overthinking it.

It has to be a connection. I'll check into it later.

Thanks

It's fixed FINALLY! All four players 5 balls each, game over.

So this one took awhile but the problem is a bit curious.

So as I looked at the area in the schematic that @howardr posted I started looking at how all the lights traveled through the same path (Yellow wire, through Q, AX, P) SO if ball on worked they should all work.

As I fiddled around with the wiper disc on the player unit it shifted/rotated slightly, as the screws were not real tight (see yellow in picture) so since the wipers and disc don't have perfect "registration" (to use a printers term) they touched properly in ball one but when the wipers moved to ball 2 and beyond the wiper sat on the edge of the rivet but must have been a bit dirty so it didn't make good contact.

So I shifted the disc and used a flexstone along the whole bottom arc of the wiper disc and that did the trick.

Crazy!

Thanks for everyone's help @currieddog @rolf_martin_062 @howardr, just have some playfield cleaning to do.

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