(Topic ID: 164238)

Black Hole f6 fuse

By StratDoc

7 years ago



Topic Stats

  • 6 posts
  • 2 Pinsiders participating
  • Latest reply 7 years ago by StratDoc
  • Topic is favorited by 1 Pinsider

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#1 7 years ago

I posted this under tech, early ss, but throught I would post here as well.

My f6 fuse keeps blowing as soon as I start the machine. It appears to control the upper playfield GI since that is not working. I have checked for shorts in the light sockets,,wiring, etc and re-slider some bad joints but it still,is blowing. If I disconnect the plug on the bottom of machines that connects to the upper playfield it does not blow. Attached is a picture of the non-controlled illumination schematic with an arrow pointing to the offending fuse.

Thanks,

Robert

image_(resized).jpegimage_(resized).jpeg

#2 7 years ago

what's the resistance between the two GI lines?

#3 7 years ago

How would I test that? I have meter but not sure where to connect the wires.

Here is an update -
I traced the black/blue/blue color wire from f6 fuse to the playfield. It had one of those multi-switches on the other end - plastic piece that operates multiple switches. It needed adjusting. I did that and reinstalled the fuse and it did not blow immediately. No GI on the playfield and fuse blows after a few minutes.

I removed all of the GI on the playfield, put in the fuse and it did not blow. I added each GI light back one at a time and checked the fuse after each time. All lights replaced, the fuse did not blow but I still do not have GI on the top playfield. Started a game, fuse did not blow still no GI on upper playfield.
Thoughts? And thank you for bearing with a pinball noob, but I am enjoying leaning from you all.

#4 7 years ago

Failed again. Stumped.

#5 7 years ago

I assume that plastic thing was the T relay? are you sure that the switch on it that the GI goes through is closed when the lights should be on? Try measuring the AC voltage at the GI busses, then on the other side of the T relay, and on the other side of the fuse

#6 7 years ago

Yes, I believe it is the T relay. it has four switches. The switch connected to the f6 fuse wore appeared open before adjusting it. The other three switches were closed.

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