T2 pinball right flipper fuse blowing

bongoben

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Hey... I am helping my father with his Terminator 2 pinball which recently has been having problems with the right flipper. The game worked flawlessly up until about a month ago when the flipper started getting really weak. At that point I noticed that the capacitor on the right flipper switch (at the button) was completely burned up. Riptor provided me with a few new ones.... (see here: http://forums.arcade-museum.com/showthread.php?t=123241) so that has been replaced. Also, one of the wires coming from the yellow capacitor on the flipper assembly was snapped and barely touching its connection point. We installed a flipper rebuild kit on both flippers and a new coil on the right flipper as the one that was installed there was "too big".

So tonight...

1- All of that installed we powered the game on and immediately upon pushing the right flipper button the fuse blows.

2- We replaced the fuse and powered the game on again but instead of starting the game we ran a switch test on that switch and as soon as it was triggered the fuse blew again.

3- As one last check I plugged the right flipper wiring into the left flipper switch molex to see if it was the capacitor on the right flipper button switch but the fuse blew right away there too.

I checked all of the wiring and all of my solder joints and everything looks clean. Did a general scan over the flipper section of the pcb and didn't see any burned resistors or caps or anything. I'm completely lost as to where to go from here... any ideas? It was recommended to just remove that capacitor alltogether from the flipper button switch but seeing as the left flipper works fine but the right flipper when plugged into the left flipper button switch still blows the fuse I don't think that's it. Help!!!
 
Are you sure you wired the coil correctly?

Edward

Nope. My father was actually the one who soldered them in and I did a quick check but it appears as though the lug 1 and 3 wires were backwards. From what I'm reading not only would this cause the fuse to blow but it would also blow the diodes. Is this correct? I've never tested a diode but from what I am reading it looks like I would have to unsolder and/or clip one side of the diode to read it, correct? The pinrepair site also says that there's probably a blown transistor and diode on the driver pcb. Well, that's all for tonight. Will have to do some research and pick up some parts to give it another go as soon as I can get over there. I will get some pics of the wiring soon to post up here but ANY and ALL help on what I should be looking for would be greatly appreciated.
 
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Flipper Problem

If you were able to resolve this problem, I sure would like to know. I did the same thing and originally thought that my son had posted the questions that you had.

Billy Byrd
 
If you were able to resolve this problem, I sure would like to know. I did the same thing and originally thought that my son had posted the questions that you had.

Billy Byrd

Just got a PM from someone else about this thread and in looking for what our answer was realized I never replied with what was up.

It was (drumroll please) a blown diode. When my father soldered the wires back onto the new coil (his first time working on his pin) he soldered them back on incorrectly. In doing so as soon as he powered up and hit the flipper button it blew the diode and thus blew the fuse.

The fix was a matter of replacing the diode then resoldering the wires to the coil correctly. As soon as we got it all back together it worked fine.
 
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