Guns N Roses Help

[Fintan Stack]

Hold the phones people!!!! I just played a game! A game with all lamps........

Back in a mo.

 

[Paul]

 

[Pudsey pinball]

What was it?????

 

[Fintan Stack]

The blue white wire that runs from F2, to the bridge rectifier, the big blue cap and then to CN4 has a connector thingie on it which means I can disconnect just that one wire. This has stopped the fuse blowing and the lamps are all on now. Obviously not a solution but progress none the less.

I just played 2 games and everything seems to be working. Now got to work out what that wire is for and what I need to do. But it's nice to see the game lit up again!

 

[Paul]

That makes no sense - that wire would have been connected all the whilst it was here, and played flawlessly - ffs - pinball machines have a mind of their own...

 

[pinballmania]

Have you got a picture. That doesn't compute. The blue white wire should only feed the input to the bridge. The outputs should be a different colour possibly violet and black. Where is the thingie ?

 

[pinballmania]

Here we go.


The CPU board cn4 is used as a bridge to connect the 18v feed back onto the loom and down into the cabinet to feed a meter board. Either that wire is shorting somewhere, or if a meter board is fitted it has a short.

The wire is indicated in the picture as attaching to CPU cn4/9 18v

 

[Fintan Stack]

My mistake, sorry. It doesn't go to the big blue cap.

Here
are some pics:

Fuse that blows (with blue/white wire):



And where I have disconnected it:

 

[Pudsey pinball]

You sure the bridge is good?

 

[pinballmania]

Yes I sit in front of schematics all evening solving wiring conundrums. For completeness, the 18v dc becomes a violet wire which goes to the power supply board. It's then fused and output onto 4 pins and becomes four blue wires that are then split over 7 pins onto the CPU lamp inputs. The blue white is then powered via cn4 (this connection broken when cn4 is unplugged ) and becomes blue wire to the cabinet to power the coin door. I suspect the short is around the coin door.

 

[Fintan Stack]

Yes I sit in front of schematics all evening solving wiring conundrums. For completeness, the 18v dc becomes a violet wire which goes to the power supply board. It's then fused and output onto 4 pins and becomes four blue wires that are then split over 7 pins onto the CPU lamp inputs. The blue white is then powered via cn4 (this connection broken when cn4 is unplugged ) and becomes blue wire to the cabinet to power the coin door. I suspect the short is around the coin door.

Andy! This is spooky. I just remembered that the same fuse on my old TFTC was blowing many, many moons ago and I called you out and you found out it was due to a short by the coin door. I think you are right. I think it is the exact same problem. (Wish I had remembered about that sooner!!) I am off to investigate.

Thanks for all your help so far everyone. You guys are all awesome.

 

[Fintan Stack]

God bless you @pinballmania !!! You are, of course, spot on!!! Short at the coin door. Just resolved it and reconnected the blue/white at CN4 and all is well. She lives!

I am in your debt sir!


Thanks again to the rest of you guys too @Paul @ronsplooter @Pudsey pinball @Arv @Moonraker

I'm back in business.

 

[Paul]

what was shorted @Fintan Stack ??!!! I NEED to know!!!

 

[Pudsey pinball]

?????

 

[Moonraker]

Just read the remainder of the thread. You've got the answer sorted.