(Topic ID: 259463)

LED's seem to 'always' be on

By R8f1k

4 years ago


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Topic Stats

  • 30 posts
  • 10 Pinsiders participating
  • Latest reply 4 years ago by HHaase
  • Topic is favorited by 2 Pinsiders

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#11 4 years ago

If you have anti flickering add on boards or a lamp driver that supports LEDs make sure you have the 6.3vdc feature lamp bus wired to them properly. If it is not connected one SCR can light many lamps dimmly as the extra resistors provide a path to ground.

1 week later
#17 4 years ago
Quoted from pinzrfun:

Wont just adding a resistor to the socket take care of this?

if he has a LED adapter or LED compatible board in the game where the feature lamp bus is floating adding resistors won't help unless he does every single lamp ore removes the LED adapter board and goes back to stock.

When the feature lamp bus is floating on the LED boards ground then gets a path between two resistors on the LED board letting lamps dimmly glow when they should be off.

This is more than likely why the OP is seeing some lamps come on dimmly when they shouldn't. I can't think of any other scenario that would do it unless maybe some crazy ground potential issues where the LDB is at different ground than the feature lamp bus is.

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