Quoted from rwarren28806:
In the middle of a game last night the game shut off and reset itself. When I tried to restart it, I hit the start button, I hear 3 clicks along with the 2 flashers (F6) on the left side flashing 3 times. The DMD shows player 1 and 00 score but it won't do anything else. I checked the diagnostics and it shows an error that says switch #20 open, but that it is not used. I checked the wire (white-yellow) at the CN7 connector and found it to be fraying a bit and I fixed that. Fuse at F21 was blown. I replaced it, turned it back on and it blew again. So I have a short someplace. Since it appears to be associated with coils 1 through 13, as none of those work, anyone have any suggestions on how to track it down?
What does the manual say the fuse 21 does/is for?
Wow sega was real specific: coils
Hahah ok. Mmm here is the fuse list and it says it is for 50v coils but there is another fuse for flippers, so it narrows it down a little more as well.
You’ll want to check visually and physically to make sure wires at the 50v coils listed are soldered. Also check wires and the wire harness at the location where the head meets the cabinet. Even with the protective plastic many times the wire loom gets caught and pinched, this breaking a wire internally.
You could also try after visual inspection, replace the fuse, have the coin door open, go into test (have the safety switch off so high power isn’t on,) see if any coils or tests blow the fuse. Then enable to high power coils by pulling that switch out. And see if it won’t blow until you can test each single coil
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