(Topic ID: 113558)

Trying to replace flashers with LEDs, but no luck

By ForceFlow

5 years ago

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  • 6 posts
  • 3 Pinsiders participating
  • Latest reply 5 years ago by ForceFlow
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#1 5 years ago

I'm trying to replace four incandescent flashers on my Gottlieb Genesis with SMD variants, but they aren't working. These are the four lamps under the ramps.

However, there is another section of incandescent flasher bulbs (marked as the "playboard"), which gives me different results.

On the diagram, the ramp lamps and the playboard lamps are both #67 bulbs and are both fed from the same +24v line from the transformer and pass through 4ohm 7W resistors before reaching the lamps.

At this point, I'm a bit puzzled about what the dependency is between the ramp lamps and the playboard lamps. Any ideas? Thanks


#2 5 years ago

Hmm...now the original flasher bulbs for the ramps aren't working at all.

The voltage does change when the lamps are supposed to flash, but I don't seem to be able to get an accurate reading since they only flash quickly. It looks like it maxes out at 8v if I use a multimeter on the lamp socket and lamp button.

#3 5 years ago

Try taking a voltage reading before the resistor.

#4 5 years ago

Nevermind, I figured it out. I backedtraced the issue to a connector on the driver board which wasn't pushed down all the way.

#5 5 years ago

I find it interesting that many of these lamps rated for about 12-14V are wired in parallel on a 24V circuit. I know, at least with PinBot, had to re-wire the Flashers in series to prevent the LEDs from burning out, (only with the 12V rated, 5smds though), haven't worked with the 8smds, my 2 cents.

#6 5 years ago

Yeah, having them on the same circuit as the solenoids confused me a little bit, and I didn't think to check the diagram and connector on the driver board that was controlling them.

Both the 5 and 8 smd flashers worked. However, using the 5smd without a lens/dome on them to diffuse the light, I see several distinct points of light for each individual flasher, which doesn't look right to me. So, I'll probably swap them back to incandescents. The 8smd flashers have a ring that is too large to fit through the holes on the playfield.

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