Arcade Collecting > Pinball
I'm about to buy BALLY PAC MAN PINBALL MACHINE
shardian:
If I read you right, you've had your answer and you have described the exact same problem still happening. Your End of Stroke switch on that flipper is messed up. Here is a crash course on flipper operation:
When you hit the button, High power is delivered to the coil. If you hold the flipper in, the end of stroke switch is opened up. Only a small amount of power is needed to hold the flipper in the up position, so the end of stroke switch will cut the power in half.
What happens if the EOS switch is misadjusted and not opening? Hi power will remain in the coil while the coil is raised. This will quickly burn up the coil, blow a fuse, destroy the driving transistor, etc. So go back to your flipper, and look closely as you manually manipulate the shaft. Compare what you see to the working flipper. you will notice the EOS switch open on the working flipper. Odds are it is not opening on the bad flipper.
As to why there are two switches stacked on the right flipper, that is how the upper playfield flipper is controlled.
EDIT: I re-read, and it appears you are saying the flipper doesn't move at all when you hold the button, but the fuse still blows. That's odd.
mimic:
--- Quote from: pinballjim on November 18, 2009, 09:45:33 am ---
--- Quote from: shardian on November 18, 2009, 08:22:12 am ---EDIT: I re-read, and it appears you are saying the flipper doesn't move at all when you hold the button, but the fuse still blows. That's odd.
--- End quote ---
That'll happen if your flipper coil is shorted out.
--- End quote ---
That's what I'm thinking, but I don't know how to verify that when I replaced the coil, I have wired properly. I did one wire at a time, to not make a mistake, but I could tell that old coil was replaced once and perhaps wiring was messed up already. Also someone told me there should always(?) be 3 wires on one of the coil lugs, while I only have 2 on that particular one.
One more question why self test bypasses testing flipper coils, even the good ones?
mimic:
For anyone that might stumble upon this thread, just wanted to let everyone know that I have fixed the machine. With help from guys from pinballcountry.com (hopefully no one minds the plug, if so please let me know and I'll edit)
mimic:
--- Quote from: pinballjim on December 18, 2009, 05:28:06 pm ---What was the fix?
--- End quote ---
The little diodes on the coil were bad, replacing those fixed the problem of fuse being blown at F4.
shardian:
Diode was bad on a brand new coil? Man, that is a real drag! I know I would probably tear apart every piece of the cab before I bothered to check a diode on a new coil...
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