Miss-O
Williams, 1969Miss-O has a horseshoe roll over switch in the center playfield. It doesn't work. The switch makes contact and reaches the 500 rely trip. If they relay is not tripped - it will trip it. But after that it only makes a little short buzz sound when contact is made It scores no points. I cleaned it all and seems adjusted correctly. Anyone have thoughts they can share?
Ah, thx. So does this mean I should be looking at score motor 5A? I cleaned it. I seems to be set right with one open and one closed.
Where do you see 5A? HowardR was wondering if the motor runs when the 500 relay is energized, which you can do manually.
No, the motor does not run when you energize it manually. It trips when a 500 rollover is hit. And there is a short buzzing sound every time thereafter when it hits. Contacts touching or not - nothing from the score motor.
Quoted from HowardR:When the 500 Point relay is tripped, among other things, the motor should run. Does it? If not, have a look at the highlighted switch and circuit.
So what's happening with the highlighted switch on the 500 relay?
Sorry for my lack of understanding. From the schematic section you posted - it seems to show the 500 relay as an open switch? So doesn't that mean that it closed when it trips and then in completes the circuit to run the score motor? (assuming the service jack is off). I am trying to understand the whole process. I see how the R.O. horseshoe switch completes the circuit to trip the 500 relay. I also see how closing the 500 relay when combined with bumpers A, B, C, D are closed gives you an extra ball (which it does do currently. if I light A, B, C, D and hit the rollover switch, it trips and the ball # doesn't advance next time it drains). It isn't turning the motor and giving 500 points tho.
Quoted from SDM0:doesn't that mean that it closed when it trips and then in completes the circuit to run the score motor?
You have the game there so look at the actual switch instead of speculating.
Hi pinsiders
I happen to like to do some "work in/on JPGs" in Ms-Paint and paint-net: https://www.getpaint.net/ --- then I made an PDF and then used an PDF-reducer --- You may have to download / make an copy to Your computer (?).
Look at the drawing at schematics-14/15-A/B - the drawing of the INDEX-Cam of the so-called Score-Motor - this INDEX-Cam sits next to the real motor --- want to try - When You need a turn (of 180 degrees) of the motor: Gently press (in the pin) at the INDEX-cam the top-most (in the pin) SWITCH-BLADE gently down a bit - then let go on the switch-blade - and by doing so: You make the motor do a turn. Greetings Rolf
SDMO-forget about the service jack. You would only move that to off if the game was off and you were testing something on the score motor. The switch in question on the 500 relay is normally open C, shown highlighted in the pic above. The schematic only shows the wire that actually energizes the SM. Now, with the machine on, what happens if you manually close the switches on C?
Just as a follow-up to this - you guys were absolutely right. The 500 relay tripped and it looked like all the contacts were touching, but when I used a pen to push C together... the score motor ran. It literally seemed like they were touching to me when I looked close with a flashlight. But it needed to be adjusted a tiny bit and now it works fine. Thanks for helping me learn.
Quoted from SDM0:Just as a follow-up to this - you guys were absolutely right. The 500 relay tripped and it looked like all the contacts were touching, but when I used a pen to push C together... the score motor ran. It literally seemed like they were touching to me when I looked close with a flashlight. But it needed to be adjusted a tiny bit and now it works fine. Thanks for helping me learn.
At the risk of stating what you may have already learned:
For a switch to work reliably, the long blade should move the short blade some. Even then there could be dirt or oxidation in there. Looking like their contacts are touching isn't enough.
The best way to diagnose almost all "this doesn't work when it should" problems is with Alligator clip jumper wires.
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