Does anyone know if the lamp matrix changed on F-14 in the later models that went to the PCBs for some of the insert lighting?

I have a light on the RED GREY row that stays on mostly. Flickers, goes off in some attracts modes, but never turns off in game mode.

I have checked all diodes on the row and they measure okay. I have replaced some just for certainty.

The left bonus X is shown on the matrix as last row, maybe column maybe four or five, yet seems to be a terminal as row and column wiring go to but not from to the next lamp.

Also the three CAT lights mid playfield on the right are getting too much voltage and burn out in a day. I put 12 V bulbs in there as a stopgap until I figure out the problem.

There is a nearby resistor board with one of the 300 ohm 10% 7W sand resistors that immediately gets burning hot to the touch. Are these boards only for flashers or could this be related to the excess voltages to the CAT lamps?

Thanks,

Dan

Thanks guys. Upon further inspection and consultation with the pinball pundits, all lamps in the column seem affected, so time to replace the transistor.

Dan

Changing Q58 did it. Luckily, a Radio Shack in my area isn't closing and had the TIP 42s. Lights behaving with no multiple lights in single lamp test.

All problems fixed except for my insistance to set the game to EX. HARD.

Dan