Williams transformer smoking

capcomfan

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I am currently rebuilding a Gorgar that has a trashed cabinet from water damage. The game was working before dissasembly, but needed a new cabinet and backbox built. While I has it apart, i rebuilt all of the boards (new 40 pin interconnect, remote battery, new sockets, new lamp resistors, recapped sound board, rebuilt powersupply, etc.) Everything exept adding fuses the the 2 bridge rectifiers. After I got everything back together, I exitedly flipped the switch expecting to spend the rest of the day playing pinball. Instead, I got a smoking transformer. The GI lights worked, but thatr was it. Found some melted wires on the back of the transformer. I tried cleaning them up, but the transformer still smokes without anything connected. Anyways... I guess my question is, are all system 6 transformers interchangable. I looks like I am in the market for one.
 
All sys 6 transformers are interchangeable. Makes me wonder if the water damage on the head was also water that got into your windings....ack!

Chris
 
All sys 6 transformers are interchangeable. Makes me wonder if the water damage on the head was also water that got into your windings....ack!

Chris

Sounds like he said everything was working before he took the machine apart. Also if he had everything apart I'd think if it was wet it would have dried out. Makes wonder if he hooked something up wrong and fried some of the windings and the are grounding out. Are the wires he said were melted ones that plug in to the transfirmer or windings? And if it's smoking why is it not blowing a fuse? Possible that something got spilled on the transformer while it was out of the back box?
Glennon
 
Moisture could have still gotten inside the transformer windings at one time and corroded the insulating varnish.
 
Sorry, Should have been more clear. The machine was dry when I got it. I had it working before disassembly, and it looks like something shorted while putting it back together. It looks like the transformer had been wet at some point (water stains, rust, etc), but was dry when it started smoking. The melted wires were on the output side of the transformer, looks like the problem was related to the power to the sound board ( these wire look the most melted). I have not started to pull anything back apart yet to troubleshoot. I have another system 6 machine I can borrow parts from while I work my way through finding the short, but wanted to make sure I didn't make anything worse by using an incompatable transformer. I am going to double check wiring, shorts, bad bridges, incorrect fuses, etc. this evening. I will also be adding fuses to the bridge rectifiers. I then plan on adding back one board/fuse at a time until I trace down the suspect short.
 
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