(Topic ID: 266145)

High Speed Weak Right Flippers

By Hammerhead

1 year ago

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  • 7 posts
  • 3 Pinsiders participating
  • Latest reply 1 year ago by Hammerhead
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Williams_1987_Millionaire_Manual1.pdf (PDF preview)
Williams_1987_Millionaire_Manual2.pdf (PDF preview)
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#1 1 year ago

I've completely rebuilt the flippers on my High Speed; new coils, new EOS switches, new diodes, etc. The left flipper is nice and strong and you can easily rip the spinners. However, the right flippers are quite weak; the upper right can barely get the ball up the ramp and you have to hit the shot perfectly, the lower right cannot get the ball up to the pops.

I've checked all the wiring, the diodes, the switch gaps, everything looks like it should be correct. The only thing I haven't replaced are the flipper button switches, but they look the same both left and right.

I've attached some photos, any help would be appreciated

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#2 1 year ago

Photos of the flipper button switches

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#3 1 year ago

In the manual I've taken the following snapshots; they both say that power wires go to the banded side of the diode. If that's the case it looks like all three flippers are wired incorrectly. I have the following questions:
- if they're wired backwards shouldn't I have blown something by now?
- if they're wired backwards why does the left flipper work well but the others are weak?
- the snapshots say the trace wires should go the unbanded end of the diode; I have no trace wires, they are all coloured differently than the manual

Can someone post photos of their flippers so I can maybe see where I've gone wrong.

#4 1 year ago

The flippers appear to be wired correctly. The power wires are grey-yellow (for the left flipper) and blue-yellow (for the right). And these are wired to the banded end of the diode. What's disconcerting, is that the diagram on the coil wrapper is wrong! It's showing the +50VDC power connected at terminal 1. If you actually did that, the diode would take all of the current and you'd likely blow a fuse. Wonder how many people have done that based on the wrapper diagram....

Do check where you've soldered onto the EOS switches. Those tabs look awfully close together. If they're touching, then the flipper will never switch to 'hold'...it'll always be full power when flipped (and you'd blow a fuse, eventually). This would make the flippers seem stronger though, not weaker.

Try putting an insulator (little piece of plastic from a credit card or similar) between one of the cabinet switches on the right side so that only the lower flipper fires (not the upper). Is it any stronger? Then try insulating the part of the cabinet so that only the upper flipper fires? Any different? This might help to narrow down if one flipper is affecting the other.

#5 1 year ago

Check when the EOS switch opens up. From the pictures the switch looks bent toward the flipper pawl and could possibly open up too soon, i.e. before the flipper hits the actual end of stroke.

#6 1 year ago

I've isolated the issue to the lower right coil. I swapped it out for the old beat up coil and the flipper strength returned, but it sticks so it needs to go.

This was a brand new coil; how can I test to see what is wrong with it.

#7 1 year ago

I burned out the coil due to a poorly adjusted EOS switch. Put in another coil and I'm up and running.

Hey there! Got a moment?

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