St Charles, MO
Quoted from Golgotha:I have six bulb circuits that are out. I verified that it is not the bulbs. The six outages appear to be unrelated. From looking at the Lamp Driver schematic the bulbs are J1-14 (red arrow), J1-16 (red KISS amber arrow), J3-26 (red "S" -left), J3-19 (yellow "S"-left), J3-27 (Yellow KISS amber arrow) and J3-24 (right out special). I verified all bulb sockets are fine and wire is soldered with a good connection. Any things to look for right off the bat before changing transistors? Any help is greatly appreciated. I was thinking of swapping the lamp driver board from another machine and see if that fixes it. That would indicate it IS a board issue and not wiring.
How did you verify the lamp sockets in the grid? I have replaced two of those original KISS under the playfield lamp boards with new repro boards and it made a big difference. Might not matter in your case, but those original Bally sockets can be problematic.
Have you done any connector work yet? I see four lamps out on one connector. Sometimes you might run into a connector with some broken pins inside the connector itself, especially on the outside pins. Also, some lamp connections can become corroded if there has been any battery leakage.
