G'day, i recently picked up a SFII pinball & have managed to get it all going now, except for the left Stargate ramp. The coil in it was seized up- a Gottlieb A-27642. Got a new replacement coil & have installed it but the it is still not working at all. Wiring appears to be correct (picture below ). Not really sure what else to check, is it possibly a board issue? When i check it in test mode there is no action at all - coil has no heat either. All other coils work in the game.

Screen Shot 2022-09-06 at 11.34.22 pm (resized).png

So did a bit more digging on this and looks like the F25 fuse controls the 2 stargates, via a SB1. When i checked the fuse in it, the previous owner had a 5A in it, so i dare say there will be a board issue. I swapped the fuse to a correct one and the right ramp is still working, however i can see the line in the fuse moving everytime i activate the right stargate.

Can someone confirm if a SB1 is the correct fuse? Ive never noticed a fuse insides moving before without blowing. I gave it about 30 activations and although it mnoved each time, never blew. Is that a normal reaction?

As the wrong fuse was in there i am assuming you are correct.

Can anyone walk me through how i can test the mosfet Q8 using my multimeter?

Hi everyone, been trying to learn a bit more on this. I put the MM on V & placed the red prong on the middle leg @ Q8 & the coil for the left ramp fires successfully. So since this is firing, does that mean that that Q8 needs replacing, or the fact it worked when tested with MM does that suggest their may be issues before or after the Q8?

Sorry to be a bit of a dunce with this stuff