(Topic ID: 19708)

¿General Illumination Reset?

By PinballGiant

9 years ago



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  • 8 posts
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#1 9 years ago

Okay I just finished up a major GI overhaul on my Party Zone and am having some interesting problems. I replaced J115, J120, and J121 and plugged the board back up. On a standard outlet in my house the MPU (I think that's what it's called. Whatever is responsible for stuff besides basic power) will come on after a couple seconds and reset after a couple seconds and the process repeats and I never can get the game into attract mode. On a higher voltage outlet for my computers I can get the game to boot into attract mode fine and my general illumination is fixed, but when I start a game or run a solenoid test the machine restarts. I'm stumped on this one. Why would my general illumination fix be causing the the game to reset when the solenoids are supposed to fire? When I unplug the GI power connector J115 on the board, I have no GI but my game works just fine...Thanks!

#2 9 years ago

Check the wiring on J115 versus the schematics, chances are something is shorted or miswired.

#3 9 years ago

If the game is resetting, likely your 5V circuit is failing, due to inrush of coils, etc. Same thing that's happening in the B2K2/System 11 thread....Check it out towards the end....Explains how to test the C10 cap, etc.

#4 9 years ago

Okay I'll check that out thanks. Would that theory still hold if it works fine until I plug up my j115 for the general illumination? Seems like something has changed now that my gi is wired up...

#5 9 years ago

Anything that's drawing excessive current due to bad connectors/shorts, etc, can cause a dip in voltage and effect the 5V circuit...As can a power drop at the wall outlet (as seen in the BK2K thread).

#6 9 years ago

This looks familiar.

#7 9 years ago

I don't see how GI could cause the game to reset. It's totally independent of the other sections of the driver board.

You either have a connector loose, in the wrong place, or had a coincidental failure.

To prove this, unplug J115, J119, J120, J121 and see if it continues to reset. You've unplugged the GI input (J115) and its outputs (J119, J120, J121)

#8 9 years ago

Good point John....GI is supplied directly from an independent secondary on the transformer, so it's not likely that it would cause a reset. BUT, if the GI was overfused, and the current draw was enough to drag down the transformer, all the secondary voltages could drop and cause a reset.

Hey there! Got a moment?

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