Minneapolis, MN
I've got power, and went over the wiring.
Rebuilt rectifier board.
Everything cycles and tests as it should, but I am overlooking something.
Anyone have any ideas?
(Topic ID: 196966)
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Big Game
Stern Electronics, 1980
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When I tap the button, quickly, nothing happens, and the fuse does not blow. Looks like it gets hot, but doesn't blow. If I hold the button in for almost a second, the fuse goes.
I looked down the threads of Pinside, and did find wiring examples for the flippers posted. A little hard to see, but mine wiring looks correct. EOS looks good as well.
Test the flipper button switch(s) and the EOS by the flipper mechanism for continuity. Just because they look good doesnt mean they are good. Manually move the flipper prawl and make sure it hits the EOS properly and the switch moves and behaves like its supposed to. In any case, it should be quick and easy to rule that out right away.
One other quick thought, if your flipper sleeve is warped due to the coil overheating or binding for other mechanical reasons it will be hard to move the flipper, if at all. If its tough to move by hand then that could be your problem (flipper mech is never moving at all to engage the EOS which is then tripping the fuse). New sleeve and alignment might fix the issue if you see that sort of sticking.
Thanks, Scott.
I believe something else is at issue.
I need to test the diodes, they could be goofy.
I've got decent movement of everything--I actually rebuilt all the flippers, replacing one coil. Even polished the mounting brackets.
Just can't think of the the issue.
compare the coil diodes of the right vs. left. If there is a discrepancy, replace.
compare the Ohm resistance between the coil, i'm betting you have a shorted coil.
If those two things check out, then you have a short in your wiring somewhere.
Also, since you had your mechs out, i'm guessing your had to resolder the wires back. Double check your work.
Latest:
The left flipper button now re-starts the machine.
Flipper solenoids, wiring, diodes, all correct.
decent movement on the plungers by hand.
Multi-meter tested.
Any ideas on the short?
why this is happening?
Thank you Scott and Brenna.
Z.
Alright;
I did something a little fancy.
I Added a plug section on to the rectifier board I rebuilt.
I think this was smart.
Soldering the transformer to the rectifier sucks.
This will make repairs easier.
If any of you regulars know this is dumb; please let me know.
I even swapped the S driver with a new S driver; same issue.
Game re-boots, when I hold the left flipper button in for half a second.
Tapping it, all the lights dim drastically.
Guh.
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