(Topic ID: 235759)

GTB Count-Down Blue Target Bank transistor

By DropTarget

5 years ago



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#1 5 years ago

Hi All,

Does anyone know which transistor(s) control the blue drop target bank on a Gottlieb Count-Down?

Mine is locked on.
Thank You

#3 5 years ago

Thanks, I was looking for it's driver on the driver board.

edit..

Ah, Q18 thank you

#4 5 years ago

Hmm, I changed Q18 and Q29, Q30 and the 2N3055 on the driver board. The under pf transistor tests good. The Blue's still lock on. other issues too.....like the other drop target banks not resetting.

It may be time to recheck MPU

#6 5 years ago

Thanks,

All the transistors in line check out. I'm now leaning to a bad CPU sending signal but I'll see what adding a resistor does. I Have a new CPU arriving tomorrow. Stay tuned......

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