(Topic ID: 246418)

Black Knight / system 7 flipper issues


By HeavyMetalBalls

7 months ago



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  • 11 posts
  • 3 Pinsiders participating
  • Latest reply 7 months ago by slochar
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#2 7 months ago

Are the EOS switches wired and set properly? If you have voltage, but they are under powered, maybe they are in hold position (open)? BK's are normally closed.

Remember the flippers are serial, so what happens to one flipper on a side will affect the other.

If that's not it...

In vid 4, is the voltage test to the flipper coil? If so, sounds like you have a return/grounding issue since the voltage is good at the coil. Check for ground continuity on your harness? this is why i thought of the EOS switches.

Is your cab grounding connected to the backbox? There should be a wing nut to hold the strap to the bb at the base. This shouldn't be a factor, but check it anyway.

There are two critical connectors for the playfield, the main one, then another to the upper pf. Check those for ground continuity.

Have you replaced or cleaned the flipper switches to make sure you have good contact? Same with the eos

Manual and schematics are here:
https://www.ipdb.org/machine.cgi?id=310

More info here:
http://www.pinwiki.com/wiki/index.php?title=Williams_System_3_-_7

Look here for info on the EOS switches if you need -
https://pinside.com/pinball/forum/topic/vids-guide-to-upgradingrebuilding-flippers

#5 7 months ago

If you just installed those, I would double check to make sure you have wired it properly and that he solder is good.

Read through that Vid's guide to get familiar with the wiring. Power to the banded side of diode, ground on opposite tab. EOS goes between the middle and the ground.

Your coils do not ground to the cab normally, so your reading is interesting but not the issue. They should ground to a brown? or brown and black? wire that go back to the power board. That's where you need to check the continuity

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