(Topic ID: 235280)

Diode dierction: Gottlieb system1 coils.?

By DropTarget

5 years ago



Topic Stats

  • 2 posts
  • 2 Pinsiders participating
  • Latest reply 5 years ago by wayout440
  • No one calls this topic a favorite

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#1 5 years ago

Hi,

Can anyone tell me or better show me how the diodes should go across the drop target reset coils on a Count-Down?

I think someone may have installed 1 or 2 in the wrong direction.

Thx

#2 5 years ago

If a coil diode is installed backwards you'll know it quickly, because it will short coil power directly to ground and usually taking out a coil power fuse.

Diodes across a coil are always reversed biased. (cathode, or striped indicator towards coil power). In almost any game the coil power is a fatter wire daisy chained to multiple coils. If you can't Identify it visually, use a schematic. If you don't have a schematic, you can unsolder the coil wires and use a voltmeter to identify the power supply side of a coil.

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