(Topic ID: 226218)

Incandescent bulbs work but not LEDs?

By branlon8

5 years ago



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  • 2 Pinsiders participating
  • Latest reply 5 years ago by PinMario
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#1 5 years ago

I have a Dr. Dude which shows this problem - I put LEDs in the Playfield inserts a while back only to discover that they were essentially always on. So I took them all out again and the game is fine - except for the lit lights in the Dude-o-meter which have sort of a slow pulse which actually looks kind of cool (like a smoldering fire), but probably not intended.

I figure it has something to do with cyclical signal sent to the lamps and that leds react faster. I did some rudimentary Transistor Checks on the lamp matrix, but saw no indication of an issue. Since the issue was on most of the inserts I figured it had something to do with the unit generating the pulse driving the transistors (I think the only LEDs I could leave in the game were those under the mixmaster flasher domes - I don‘t mean the flashers though, but maybe I need to check this).

Any suggestions, tips, easy solutions (or hard ones) ?

#2 5 years ago

Anybody have any ideas how I can approach this?

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