Hi all I have a Bally Playboy and Mata Hari which I have purchased LEDs for and installed. I also have installed purchased and installed the LED conversation boards for the lamp driver board ( they piggyback J1,J2,J3.

The issue I have is that on the Playboy I have one insert that continues to flicker and on the Mata Hari I have three inserts that flicker. The flicker is as if the piggyback board is not there. Both games are related to J1. I swapped out the J1 with one from my fully working Night Rider same result same inserts flicker. Also swapped out the LEDs with no change still flickering.

These inserts worked fine with the incandescent bulbs.

Any ideas on what is going on here?

Don

Yes those are the ones... purchased from Comet pinball...

Thanks all for the reply’s both games have been fully restored including new lamp sockets. I have also verified all boards are installed properly. What value resistor should I use? I don’t mind adding a few resistors...

One more question what SCR should I use if needed as the the ones used are obsolete correct...

Thanks I have a large stock of electronic components but no MCRs I’ll pick some up!

Well I added a 470 ohm and all it did was dim the insert still flickering

No in series nipple to the wire.

Ah nipple to base to limit or slow the current...

Will do thanks!

Problem solved no flickering used a 470 ohm resistor from base to nipple lead.

Thank you!