Hello everyone,

I have a problem with the 4th player 10,000s reel on 4 Million BC, when it is activated it sometimes steps 2-3 times instead of once, all the other reels work correctly, resetting and scoring as they should.

The 10,000s reels work through the 9th position switch on the 1000s reels and the 1000 point relay, if I manually activate the 1000 point relay on players 1,2 and 3 the reel steps up once as it should, if I hold the 1000 point relay in a bit longer, the 10000pt score reel solenoid locks on as I would expect, however, on the 4th player reel if I hold the 1000 pt relay in a bit longer, the score reel spins round as the solenoid is continuously energising and de-energising.

Any ideas please?

Many thanks

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Thanks for your help,

I have double checked the EOS switch on the 1000s reel, it is closed and making good contact and it opens when the solenoid energises.

I have double checked the 9th position switch on the 4th player 1000s reel and it is not bouncing, it is closing solidly and the problem persists.

I can see from the schematic that the circuit goes through a wiper on the player unit, this is the only thing I can see that is particular to the 4th player 10000s reel but it looks ok.

It's got me baffled!

Thanks Mark,
I have had a closer look at the 4th player 1000s reel 9th position switch, I jumpered around it with no change, I also checked the resistance of the switch when closed and it was 0.001 Ohms. I thought perhaps the wiper on the player unit was making intermittent contact and causing bouncing but it is ok, I tried jumpering around the player unit, this also made no difference.

I then took the 4th player 10000s reel apart, I found that the coil mounting bracket had been replaced with a non original bracket, I also found that one of the black wires on the coil had been rubbing on the bracket and had worn through the insulation, I hoped that this was the cause of the problem but no.

I can only think there is perhaps a short circuit somewhere?

No, I connected a jumper between the 10,000 reel solenoid and the 1000 reel solenoid and the 1000s reel activates once each time I activate the 1000pt relay and the 10000s reel will activate multiple times very quickly, how many times depends on how long I hold the relay in.
During a game, the reel will usually turn between 1 and 3 times, it will spin for as long as I hold the relay in when operated manually, I don't want to burn the coil out so I have only held it in for a few seconds.
I have checked for any touching wires or solder tabs or blobs of solder on the switches and all look ok.

It's driving me mad!

Thanks Mark, I shall have another look at it tomorrow, I can replace the coil and see if that helps, I can also check the resistance of the coil and compare it to a known good coil.

Thanks again for your help,

Richard

Progress! I removed the suspect coil and checked the resistance - 28.1 Ohms, I then checked the resistance of a known working coil this was 29.4 Ohms which suggested that the coil was perhaps ok, I fitted the known working coil to the game as well as the correct coil mounting bracket, it worked perfectly, good news.

I fitted the suspect coil into the game I had taken the known working coil from and it worked correctly, I then fitted the incorrect bracket back into the problem game and the fault returned, the incorrect bracket is longer than the original and a thick washer had been fitted over the coil stop to take up the gap, there was no obvious reason I could see that the incorrect bracket would cause the fault.

With the correct bracket the reel works as it should so all is well.

Many thanks for your help Mark, it is much appreciated

Richard