Sys11 stuck pop bumper

spoonman

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Hey guys i have an issue with the top lwft pop bumpwr being stuck on my sys11 taxi machine.

When i power the game on the pop bumper gets stuck on, i power off and the it will go back as normal.

I checked the switch thinking it is maybe touching but no dice, i powerd it on and could see a gap between the leafs and the coil still locked on.

I am wondering if it is something before the switch thatiscausing this. I would like to get it sorted out as i dont want to power oon the game currently as i am sure if i did i would fry the coil.

The coil does move freely when imanipulate it.

Any advice would be appreciated
 
Cool i will have to dig up a schematic then.

Could a bad transistere affect my display too. Ihave the "1" in the 100,000 not really lighit at all anymore. It is a pinscore display too so i figured it would have been good for more than 1.5 years or so
 
In a recent Whirlwind thread, I had a stuck on slingshot bumper (essentially the same problem).

Test the appropriate transistor on the driver board and the pre-driver transistors on the Sys11 board. Chances are that one or more of these components has failed (and grounded itself) and will need to be replaced.

A schematic will help you locate the coil and the appropriate Q #s associated with the transistors (TIP102, 2N4401 and/or TIP36).
 
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