SI Playfield

jbk

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Donor 4 years: 2011, 2013-2015
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The thumper bumpers on my space invaders are dead. Traced the wire got good continuity back to the solenoid driver. Solenoid driver tested good in another machine. No power to the coils! It acts as if there is a missing/ bad fuse but i cannot find one. When I ground the tp102 on the board I get nothing. The (4)flippers, slingshots and ball return solenoids work normal. Is there something simple I am missing? Looking for a fresh set of eyes on this problem as I have been looking at it for a while. All of the test points are withing range on the driver and MPU.
 
The thumper bumpers on my space invaders are dead. Traced the wire got good continuity back to the solenoid driver. Solenoid driver tested good in another machine. No power to the coils! It acts as if there is a missing/ bad fuse but i cannot find one. When I ground the tp102 on the board I get nothing. The (4)flippers, slingshots and ball return solenoids work normal. Is there something simple I am missing? Looking for a fresh set of eyes on this problem as I have been looking at it for a while. All of the test points are withing range on the driver and MPU.

My guess would be that you've got a wire off somewhere that daisy-chains power to the pop bumpers. Trace the power wires back and you'll probably find your problem.

Based on this:

No power to the coils!
 
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