Rolf, here are some updates.
First I will talk about the game play. There is one playfield post adjustment for the Bon Voyage, so far I haven't changed it. With the current leveling of the machine (pretty steep) and the options I have set (3 ball, etc) the overall game play and difficulty is pretty good right now. Note that the game is getting a decent amount of play, as I always put everything back in working order after I work on it (except when I break a wire....). With a single 100,000 light, the high score is only 199,990. Our "high score ranking system" is inspired by the Top Gear (R.I.P) laptime board as you can see here (names blurred to protect the innocent). So far no one has broken 100,000, although I probably will before long.
OK now on to the coin lockout mystery. First, a picture showing my final cleanup of the coin door inside. I cleaned everything as best as I could, got rid of messy electrical tape, and made nice wire ties and routing. After working on this, I can definitely see that in order to make a "super nice" coin door, everything needs to be taken apart and all of the pieces cleaned individually. I might tackle that sometime down the line just for the experience of doing it.
Right now, everything works as far as the two coin machines. When quarters are inserted, credits are loaded as expected. There is one exception, which is the lockout coil. In the above picture, the 2 wires for the lockout coil are tied off at the top with some orange electrical wire nuts. Unfortunately someone cut those wires pretty short (not me) so they will need to be extended if the lockout coil is to be connected someday. For now, I used some jumpers for some testing.
Here you can see the lockout coil mounted back on the machine. Even though it is disconnected, this is a good place to park it so it won't get lost. As you can see and as I have posted earlier, it is missing the spring and connecting plate to connect to the lockout bar. So unless I can find those parts, it will not be able to work. That is OK for now, as it isn't really necessary for a home machine.
But what about the mystery of the coin lockout circuit and the "infamous resistor"? I have read all of the links about this that you put up. I will give you my ideas about it.
Before I do this, here is something to consider. Right now, there are 3 things going on with the BV at the same time.
1. People are playing it and having fun.
2. I am going through it with a "lite restoration" as I have been describing here.
3. I am going through the schematic and everything in the machine to try to understand how everything works.
For #3, I think I have the same interest as you, and maybe a lot of others. I enjoy trying to figure out exactly how every bit works, and how the logic is accomplished through all of the EM, with no solid state circuitry at all. In order to do this, I have spent quite a bit of time looking at the schematic and looking at how the game operates, and now I have started a project to break down various actions (start the game, ending the game, scoring points, etc) and figure out how everything relates. In addition, I have started working on a new version of the schematic in Visio, since the paper one can be difficult to read in places. This is going to be a pretty big project and it is going to take me some time, but hopefully you will find it interesting and help out. I am not sure if I should post all that information in this thread, or start another thread about the schematic in the EM Tech forum.
BUT, for now, let's look at the coin lockout circuit. For the BV, the entire circuit is pretty simple. Here it is:
Bon Voyage Schematic lockout coil.jpg
Obviously we know that the coil is not activated when the power is off. When the power switch is turned on, the coil is activated. Even though it is not connected mechanically, it is easy enough for me to tell this by holding a piece of metal near it, as when it is activated it puts out a strong magnetic field (which normally would be used to overcome the spring holding the connecting plate which is then connected to the lockout bar).
We also know that the power to the coil is kept supplied through a normally closed switch 1B on the score motor as shown. It is my belief that the score motor switch is there to take care of the "throw in a second coin really fast" situation. When the first coin is put in, the score motor makes a rotation. During the time of that rotation, the switch 1B opens, and then the coil gets no power and it goes off. I confirmed that this is what happens. If I put in a coin, the magnet from the coil immediately goes off, and it doesn't come back on until the score motor gets back to index position and therefore switch 1B is closed again. So, just after putting in a coin, the lockout bar will spring back into place for a few seconds and therefore a second coin that gets shoved in too fast would be rejected and come back out. This is pretty simple and effective.
BUT, what about that 8200 ohm resistor? Just as you said, here it is on the connector plug. Even though it is hard to tell from the picture, I can confirm that one end is connected to the yellow wire (one main 60VAC line) and the other is connected to the gray/red wire which then goes to the coil as shown in the schematic. Nowadays it is easy to confirm the resistor value by just entering the band colors in an online chart, and that confirms that this is an 8200 ohm resistor.
So why is it there and what is it supposed to be doing? This web page seems to explain it http://bingo.cdyn.com/techno/readschem/resistor.html
Case 2 - using resistors to prebuild a small magnetic field
The coin lockout magnet is the coil behind the coin mech that causes the coin reject plate to insert itself in the mech. The idea is that if someone is dropping in coins quickly, you only want the first one to register and the rest to dump out the coin return until the game is ready to start another cycle.
Without the precharge resistor, the response of the coil lockout mechanism is too slow. The game would tend to accept two coins before rejecting further ones.
It does take time to create the magnetic field in the coil. What happens if it takes too long? One solution is to maintain a constant low current in the coil. Not enough to make a field that can pull down the metal plate, though. A small magnetic field is established, and when you switch in more current it takes less time to make the field strong enough to activate the plate.
This is the case where the inductance property is irritating, so the resistor is added to precharge the coil. You usually see this in the "coin lockout magnet" circuit.
But this doesn't make sense to me. In this circuit, the coil is already on as soon as power is applied, and the magnetic field is at full strength, holding the lockout bar in "accept" position. This seems to be backwards from what is described here.
There are several different theories on this web page: https://groups.google.com/forum/#!topic/rec.games.pinball/P6XIk-hG-Tw
One theory is that it is there to prevent arcing. Another theory is that it helps keep the magnetic field from getting low as the coil stays on for extended periods of time. Both of these sound reasonable to me and I don't have enough knowledge to know which is better. It is left unresolved in that thread.
There is one more test to try, which I did. I disconnected one end of the resistor, and then compared the behavior with the resistor and without the resistor. As far as I can see, everything acts the same.
- The coil is on, then when the coin is inserted, the coil immediately goes off when the score motor starts, then it immediately comes on when the score motor stops. It all seems exactly the same, with or without the resistor.
- I turned out the lights and watched the score motor #1 switch. There is definitely a spark that comes at about the time the score motor stops, which would be when the coil is coming back on. But, it seems to be about the same either with or without the resistor. Maybe it was a little but smaller with the resistor in place, but it is not the same every time and it could be my imagination, so this must remain undetermined.
So, the mystery remains.....