I’m beginning the restoration process of a Domino. Schematic is on order from PBR. Does anyone have the startup sequence that they can share?

When I turn on the power, the lights in the back box turn on. After adding credits manually and pressing the start button, the credit stepped decreases by 1, the score reels reset to zeros, finally the relay bank resets (which makes the playfield GI turn on for a split second). But that is it, the ball does not get kicked out and the playfield GI and all the playfield mechs have no power, except for the two kickout holes which are always powered up.

Thanks in advance!

Howard, I checked the circuit. If I bypass the open side of the DB make-break relay then the outhole relay starts to switch and the outhole kicker shoots the ball into the outlane. The machine gets stuck in a scoring motor loop with the outhole kicker firing. Unfortunately, none of the playfield GI or scoring switches/pop bumpers/flippers work. That part of the circuit is not getting power.

Rolf, the R-relay does hold after startup and stays like that until the power is switched off. I checked the voltage on it and it reads close to 30V. The TB relay does reset when the reset bar plunges.

I'm not great at debugging without a schematic, I should be getting this later this week and get back to getting this machine working.

I have added a couple photos of the machine. It was in an boarded up bus station. Not the best environment for a pinball, but I plan to bring it back.

Thanks again for the help.

Alberto

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Rolf, you were 100% correct. The tilt switch in the head was stuck shut. Once that was sorted, the GI lights come on and stay on after the Start button is pushed.

Now the machine is stuck in a scoring motor loop. The outhole kicker is not firing. I can make it fire if I jump one of the normally open switches on the DB relay. This is the next thing to debug.

Getting closer. Thanks again for the help

Alberto

Rolf, the problem was the Reset (DB) relay not pulling in after the reset cycle completed. The make-break switch on DB controls both the power to the O relay (on the NO side) and runs the score motor (on the NC side). With it not pulling in, the score motor would not stop and the outhole kicker would not fire. Pulling it in by hand actually let me play a game tonight.

I need to check the run out switches for the scoring reels since those control the DB relay pulling in.

Thanks again for all your help and also HowardR’s

Alberto

After cleaning the Jones plugs in the Backbox, the game now starts with no issues.

I do have a question on the Runout Switches for the counters. Looking at the 1s and 10s counters, the Runout switch is open in the 0 position and closed for all others. Is this the correct operation? If it is, then how would the DB relay ever pull-in when the counters are all reset?

Thanks

Alberto

rolf_martin_062 --> the pin does run so my question was just curiosity. The pin right now is all taken apart since the cabinet was broken and also had mold/mildew. All this is being cleaned before I put the pin back together again. I should have looked more closely at the schematic. I need to find out where the "Ones Unit Runout" is versus the "Ones Runout".

HowardR --> I just checked the reset bank. When the bank has been reset, those switches are closed. When the DB relay is energized, the switches are open.

Alberto