I've had this one problem with my Whirlwind for years but not found root cause to fix it yet.
On my Whirlwind, all lights, flashers and illumination work fine, except one: the "10" Skyway Tolls Collected will not light up ever.
I have done the following checking:
- it is not the bulb itself or the removable socket (checked by swapping)
- there is no voltage ever reaching the socket for "10" at all on the wire molex connector under playfield
- there is continuity on the RED with GRAY-BAND wire from the board connector to the under playfield connector
The lamp matrix table says transistors Q87 x Q60 would be controlling power to that bulb? However on the matrix all the
other bulbs on the row x columns on Q87 and Q60 work perfectly. So I am missing something but not sure what.
So what component might be the problem that would prevent just this one "10" Tolls Collected bulb not to ever light?