Pinball Sling Bumper Help

SpartyMAC

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Just curious is there anykind of trouble shooting I can do to try and figure why my sling bumper is not working? It registers the score but it does not shoot the ball off the bumper like the left one. Is this a part that just goes bad and needs to be replaced? Thanks

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get an alligator clip jumper and connect the hot wire on the working side to the hot-wire on the non-working side. Now hit the switch on the working side and both should fire. If so, the coil is good. Then hit the switch on the non-working side. If none fire, then the problem is the wire to the non-working coil. Check the connector off the board (if it's solid state) and the drive transistor for that coil.

If the non-working coil does not fire with the hot wires jumpered and hitting the working side switch (and the working side coil fires), then switch your jumper to the ground wires to the coils. if it works now, then your problem is with the ground connection to the coil. if it doesn't then the coil (or the diode on it) is bad...
 
I took your advice and put a jumper wire from the Red wire in the picture to the red wire on the other side. When I did that everything worked perfect. The left side only fires when it is hit and the right side fires when it is hit. They never fire at the same time. That sounds kinda weird to me but it seems to work.
 
That means a ground issue. There is a break in the ground connection to the non-working side. Trace it back to the connector on the board to make sure it is good. Might be a loose wire at the connector or a cold solder joint. Do a continuity check from the coil to the connector to make sure there isn't a break somewhere. Then try wiggling the connector while hitting the switch. if the coil works and doesn't while you wiggle the connector, it's either a loose wire in the connector, a bad or bent pin in the connector, or a cold solder joint underneath....
 
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