| **Reel Slots** Gaming Machines > Bally Electromechanical |
| Bally 742-A blowing fuse |
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| newkid3:
Hello all, I have very little experience with Electro mechanical slot machines. I have a Bally 742-A that is blowing the 50v 3 amp fuse. I have done some troubleshooting. I pulled the hopper and reels out of the machine. I also unplugged both door plugs. Then I plugged the machine in and pushed the door switch in just to make sure everything was connected. I then unplugged the machine and checked the fuse and it was still good. So then I hooked up the top door plug and plugged the machine in pushed the door switch. Checked fuse and it was still good. So then I plugged the bottom door plug in and did the same test. It blew the fuse. It seemed like it did not blow the fuse until I pushed the door switch in. It sounded like the counter clicked when I pushed the door switch in. Then when I checked the fuse it was blown. So I put everything back in the machine and connected the top door connector but left the bottom connector unplugged. I plugged the machine in and pushed the door switch and the fuse did not blow. So it has to be something on that bottom connector. Is there a manual and schematics out there for this machine? Would anyone know what I should check for a short from the bottom door connector? I checked for a short between the cabinet and all of the wires in that plug on both sides of connector but did not find a wire that showed a short. I just thought of something I did not have the door switch pushed in when I was testing the connector wires for a short. I would really appreciate any help you could give me. Thanks |
| newkid3:
I did do some more testing today. If I plug the machine in with everything in it and everything hooked up but the door open the fuse does not blow. As soon as I push the door switch in the counter clicks over one number and the fuse blows. So it was 84033 before i pushed the door switch in. When I pushed the door switch it went to 84034 and the fuse blew. Does anyone know what is tied into the door switch that could be shorted out? Wish I had a schematic for this machine. Thanks |
| jimliner:
Is it the coin in, coin out or drop meter that goes up by one number? My guess is the "in" meter. Jim |
| newkid3:
Jim, it has a sticker on it that says CASH BOX. Thanks |
| jimliner:
Ok, that switch is on the door along with the coin in switch. I would look for obvious sign of shorting at the switch. Usually the door switch has heat shrink on connections. Also look at wires to and from meter. You could disconnect the drop (cash box) meter and see it fuse is ok when switch is closed. I added a drop switch to a door. The wires can be routed behind a plate. That's where they were cut and taped. If fuse doesn't blow with bottom door molex disconnected, you may want to check at switch on door. |
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