Rare IGT

[crazy coin op junkie]

I need help here we have an IGT Whirl Wind also known as a FG-506 as the name plate reads, AKA coin flipper, control board has anyone ever seen one of these boards? I’d love to buy another set. Anyway maybe someone can help me fix this set, when the machine is cold and first powered on everything works fine then one thing at a time starts to malfunction like the controller is not putting out enough power, a good example of this is there is a 110 volt diverter solenoid this is always the first thing to stop working when it does stop working and I meter the voltage going to it it only reads 8 volts, then there are two solid state relays that only take a few volts to work they start going crazy on off on off very fast, and then the machine tries to restart everything sometimes it can other times you have to power down and wait a few minutes. I’m not an expert but I’m thinking maybe a capacitor is bad? If so how could I test the capacitor? Or it could be the transformer on the board; I couldn’t find any information on it the only thing it says is “signal� which I know tells us nothing.

 

 

 

 

[crazy coin op junkie]

opps here are more pics

[Op-Bell]

That would be a rare IGT, yes! And a very old one. Good luck finding spares.

My guess is that it's a component heating up and expanding, disturbing its connections. I would check the socketed chips first - ease them out and back again. Then I'd apply my calibrated finger to see if any of the chips get noticeably warm, and give them a closer examination. The fault is probably on the board with the transformer.

Unfortunately, the faulty connection is quite often inside the chip package with 20 year old parts. One way to find these is to get a freezer spray - they used to sell it at Radio Shack, I don't know if they still do. The freezer spray has a long thin tube on the nozzle that lets you spray one chip without hitting the one next to it. When you spray a chip and the fault clears, that's the one to replace. You don't need to spray until frost forms, just cooling below room temperature usually does the trick.

It's not a bad idea to replace the big capacitors when they're more than 10 years old, as they do tend to dry out and lose capacity - that big orange guy should probably retire. It looks as if someone already added a few new caps here and there. But 10:1 your problem is a chip.